/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:09:13,382 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:09:13,384 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:09:13,408 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:09:13,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:09:13,410 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:09:13,411 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:09:13,413 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:09:13,414 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:09:13,415 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:09:13,416 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:09:13,417 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:09:13,418 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:09:13,419 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:09:13,420 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:09:13,421 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:09:13,421 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:09:13,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:09:13,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:09:13,426 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:09:13,427 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:09:13,428 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:09:13,430 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:09:13,430 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:09:13,433 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:09:13,433 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:09:13,433 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:09:13,434 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:09:13,435 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:09:13,436 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:09:13,436 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:09:13,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:09:13,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:09:13,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:09:13,439 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:09:13,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:09:13,440 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:09:13,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:09:13,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:09:13,441 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:09:13,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:09:13,446 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 16:09:13,491 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:09:13,491 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:09:13,492 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:09:13,492 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:09:13,493 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:09:13,493 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:09:13,493 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:09:13,493 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:09:13,493 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:09:13,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:09:13,494 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:09:13,494 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:09:13,494 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:09:13,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:09:13,494 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:09:13,495 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:09:13,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:09:13,498 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:09:13,498 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:09:13,498 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:09:13,499 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:09:13,499 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:09:13,499 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:09:13,499 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:09:13,499 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:09:13,499 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:09:13,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:09:13,500 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:09:13,501 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:09:13,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:09:13,812 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:09:13,827 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:09:13,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:09:13,834 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:09:13,835 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:09:13,835 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_2.i [2020-10-12 16:09:13,917 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b05631256/9e1113a6ab8b4058b506988616acf182/FLAG483010391 [2020-10-12 16:09:14,407 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:09:14,408 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_2.i [2020-10-12 16:09:14,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b05631256/9e1113a6ab8b4058b506988616acf182/FLAG483010391 [2020-10-12 16:09:14,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b05631256/9e1113a6ab8b4058b506988616acf182 [2020-10-12 16:09:14,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:09:14,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:09:14,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:09:14,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:09:14,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:09:14,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:09:14" (1/1) ... [2020-10-12 16:09:14,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@278e8dd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:14, skipping insertion in model container [2020-10-12 16:09:14,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:09:14" (1/1) ... [2020-10-12 16:09:14,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:09:14,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:09:15,057 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:09:15,061 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:09:15,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:09:15,087 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:09:15,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15 WrapperNode [2020-10-12 16:09:15,087 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:09:15,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:09:15,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:09:15,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:09:15,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (1/1) ... [2020-10-12 16:09:15,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (1/1) ... [2020-10-12 16:09:15,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (1/1) ... [2020-10-12 16:09:15,191 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (1/1) ... [2020-10-12 16:09:15,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (1/1) ... [2020-10-12 16:09:15,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (1/1) ... [2020-10-12 16:09:15,202 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (1/1) ... [2020-10-12 16:09:15,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:09:15,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:09:15,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:09:15,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:09:15,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:09:15,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:09:15,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:09:15,272 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 16:09:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:09:15,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:09:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:09:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 16:09:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 16:09:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:09:15,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 16:09:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:09:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:09:15,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:09:15,439 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:09:15,439 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:09:15,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:09:15 BoogieIcfgContainer [2020-10-12 16:09:15,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:09:15,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:09:15,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:09:15,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:09:15,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:09:14" (1/3) ... [2020-10-12 16:09:15,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470644a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:09:15, skipping insertion in model container [2020-10-12 16:09:15,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:09:15" (2/3) ... [2020-10-12 16:09:15,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1470644a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:09:15, skipping insertion in model container [2020-10-12 16:09:15,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:09:15" (3/3) ... [2020-10-12 16:09:15,453 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2020-10-12 16:09:15,464 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:09:15,471 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:09:15,484 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:09:15,509 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:09:15,510 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:09:15,510 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:09:15,510 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:09:15,510 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:09:15,510 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:09:15,511 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:09:15,511 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:09:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-12 16:09:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:09:15,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:15,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:15,534 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:15,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:15,540 INFO L82 PathProgramCache]: Analyzing trace with hash 650151859, now seen corresponding path program 1 times [2020-10-12 16:09:15,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:15,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085059219] [2020-10-12 16:09:15,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:15,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:15,686 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:15,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:09:15,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:15,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-12 16:09:15,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:15,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:09:15,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:15,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:09:15,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:09:15,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:15,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:15,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:15,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:15,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:15,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:15,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:09:15,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:15,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:15,741 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:15,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:15,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:15,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085059219] [2020-10-12 16:09:15,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:09:15,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:09:15,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242509131] [2020-10-12 16:09:15,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:09:15,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:15,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:09:15,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:09:15,776 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2020-10-12 16:09:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:15,819 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-12 16:09:15,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:09:15,821 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-12 16:09:15,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:15,830 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:09:15,830 INFO L226 Difference]: Without dead ends: 14 [2020-10-12 16:09:15,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:09:15,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-12 16:09:15,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-10-12 16:09:15,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-10-12 16:09:15,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-10-12 16:09:15,900 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-10-12 16:09:15,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:15,900 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-10-12 16:09:15,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:09:15,903 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-10-12 16:09:15,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:09:15,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:15,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:15,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:09:15,905 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:15,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:15,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1133927695, now seen corresponding path program 1 times [2020-10-12 16:09:15,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:15,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221628993] [2020-10-12 16:09:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:15,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:15,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:09:16,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-10-12 16:09:16,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:09:16,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:16,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 16:09:16,026 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:16,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:16,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:09:16,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:16,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:16,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:16,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221628993] [2020-10-12 16:09:16,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:16,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:09:16,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051731785] [2020-10-12 16:09:16,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:09:16,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:16,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:09:16,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:09:16,068 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-10-12 16:09:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:16,116 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-10-12 16:09:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:09:16,117 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-12 16:09:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:16,118 INFO L225 Difference]: With dead ends: 21 [2020-10-12 16:09:16,118 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:09:16,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:09:16,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:09:16,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-12 16:09:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-12 16:09:16,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-10-12 16:09:16,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-10-12 16:09:16,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:16,125 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-10-12 16:09:16,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:09:16,125 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-10-12 16:09:16,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-12 16:09:16,126 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:16,126 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:16,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:09:16,127 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:16,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:16,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1942427985, now seen corresponding path program 2 times [2020-10-12 16:09:16,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:16,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603855724] [2020-10-12 16:09:16,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-12 16:09:16,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 16:09:16,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:09:16,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:16,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 16:09:16,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:16,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:16,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:16,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:09:16,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:16,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:16,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:16,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:16,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:16,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603855724] [2020-10-12 16:09:16,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:16,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:09:16,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578844171] [2020-10-12 16:09:16,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:09:16,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:16,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:09:16,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:09:16,271 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-10-12 16:09:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:16,301 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-10-12 16:09:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:09:16,302 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-12 16:09:16,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:16,303 INFO L225 Difference]: With dead ends: 23 [2020-10-12 16:09:16,303 INFO L226 Difference]: Without dead ends: 18 [2020-10-12 16:09:16,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:09:16,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-12 16:09:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-12 16:09:16,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-12 16:09:16,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-12 16:09:16,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-12 16:09:16,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:16,311 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-12 16:09:16,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:09:16,311 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-12 16:09:16,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:09:16,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:16,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:16,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:09:16,313 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:16,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:16,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1522126099, now seen corresponding path program 3 times [2020-10-12 16:09:16,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:16,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909421684] [2020-10-12 16:09:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:09:16,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-12 16:09:16,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:09:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 16:09:16,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:16,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:16,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:16,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:09:16,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:16,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:16,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:16,460 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:16,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909421684] [2020-10-12 16:09:16,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:16,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:09:16,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146822542] [2020-10-12 16:09:16,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:09:16,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:16,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:09:16,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:09:16,462 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-10-12 16:09:16,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:16,498 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-10-12 16:09:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:09:16,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-12 16:09:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:16,501 INFO L225 Difference]: With dead ends: 25 [2020-10-12 16:09:16,501 INFO L226 Difference]: Without dead ends: 20 [2020-10-12 16:09:16,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:09:16,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-10-12 16:09:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-10-12 16:09:16,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:09:16,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-12 16:09:16,510 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-12 16:09:16,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:16,510 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-12 16:09:16,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:09:16,511 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-12 16:09:16,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:09:16,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:16,512 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:16,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:09:16,512 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:16,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:16,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1338939477, now seen corresponding path program 4 times [2020-10-12 16:09:16,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:16,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589755617] [2020-10-12 16:09:16,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:09:16,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-12 16:09:16,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:09:16,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:16,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 16:09:16,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:16,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:16,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:16,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:16,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:16,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:16,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:16,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589755617] [2020-10-12 16:09:16,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:16,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:09:16,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492145130] [2020-10-12 16:09:16,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:09:16,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:16,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:09:16,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:09:16,758 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-10-12 16:09:16,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:16,794 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-10-12 16:09:16,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:09:16,795 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-10-12 16:09:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:16,796 INFO L225 Difference]: With dead ends: 27 [2020-10-12 16:09:16,797 INFO L226 Difference]: Without dead ends: 22 [2020-10-12 16:09:16,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:09:16,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-12 16:09:16,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-12 16:09:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:09:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-12 16:09:16,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-12 16:09:16,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:16,817 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-12 16:09:16,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:09:16,817 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-12 16:09:16,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:09:16,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:16,818 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:16,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:09:16,819 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1390254871, now seen corresponding path program 5 times [2020-10-12 16:09:16,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:16,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410176812] [2020-10-12 16:09:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:09:16,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 16:09:16,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:09:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:16,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 16:09:16,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:16,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:16,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:16,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:16,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:16,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:16,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:16,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:16,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:16,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:16,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:16,958 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:16,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410176812] [2020-10-12 16:09:16,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:16,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:09:16,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627229417] [2020-10-12 16:09:16,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:09:16,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:16,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:09:16,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:09:16,961 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-10-12 16:09:16,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:16,995 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-10-12 16:09:16,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:09:16,996 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-10-12 16:09:16,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:16,997 INFO L225 Difference]: With dead ends: 29 [2020-10-12 16:09:16,997 INFO L226 Difference]: Without dead ends: 24 [2020-10-12 16:09:16,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:09:16,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-12 16:09:17,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-10-12 16:09:17,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:09:17,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-12 16:09:17,004 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-12 16:09:17,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:17,004 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-12 16:09:17,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:09:17,005 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-12 16:09:17,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:09:17,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:17,006 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:17,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:09:17,006 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:17,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:17,006 INFO L82 PathProgramCache]: Analyzing trace with hash 835259047, now seen corresponding path program 6 times [2020-10-12 16:09:17,007 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:17,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389574700] [2020-10-12 16:09:17,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:09:17,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-12 16:09:17,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:09:17,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:17,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 16:09:17,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:17,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:17,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:17,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:17,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:17,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:17,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:17,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:17,228 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:17,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389574700] [2020-10-12 16:09:17,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:17,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:09:17,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846673114] [2020-10-12 16:09:17,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:09:17,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:17,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:09:17,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:09:17,232 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-10-12 16:09:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:17,273 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-10-12 16:09:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:09:17,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-10-12 16:09:17,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:17,274 INFO L225 Difference]: With dead ends: 31 [2020-10-12 16:09:17,275 INFO L226 Difference]: Without dead ends: 26 [2020-10-12 16:09:17,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:09:17,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-12 16:09:17,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-10-12 16:09:17,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:09:17,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-12 16:09:17,281 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-12 16:09:17,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:17,281 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-12 16:09:17,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:09:17,281 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-12 16:09:17,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:09:17,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:17,282 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:17,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:09:17,283 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:17,283 INFO L82 PathProgramCache]: Analyzing trace with hash 660420837, now seen corresponding path program 7 times [2020-10-12 16:09:17,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:17,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034538076] [2020-10-12 16:09:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:09:17,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-12 16:09:17,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:09:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:17,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 16:09:17,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:17,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:17,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:09:17,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:17,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:17,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:17,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:17,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034538076] [2020-10-12 16:09:17,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:17,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:09:17,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457155798] [2020-10-12 16:09:17,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:09:17,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:17,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:09:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:09:17,434 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-10-12 16:09:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:17,473 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-10-12 16:09:17,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:09:17,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-10-12 16:09:17,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:17,474 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:09:17,474 INFO L226 Difference]: Without dead ends: 28 [2020-10-12 16:09:17,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:09:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-12 16:09:17,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-10-12 16:09:17,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:09:17,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-12 16:09:17,480 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-12 16:09:17,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:17,480 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-12 16:09:17,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:09:17,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-12 16:09:17,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:09:17,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:17,482 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:17,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:09:17,482 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:17,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:17,483 INFO L82 PathProgramCache]: Analyzing trace with hash 144625571, now seen corresponding path program 8 times [2020-10-12 16:09:17,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:17,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323174695] [2020-10-12 16:09:17,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:09:17,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-12 16:09:17,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:09:17,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:17,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 16:09:17,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:17,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:17,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:17,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:17,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:17,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:17,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:17,675 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:17,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323174695] [2020-10-12 16:09:17,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:17,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:09:17,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455045530] [2020-10-12 16:09:17,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:09:17,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:17,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:09:17,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:09:17,683 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-10-12 16:09:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:17,723 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-10-12 16:09:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:09:17,725 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-10-12 16:09:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:17,725 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:09:17,726 INFO L226 Difference]: Without dead ends: 30 [2020-10-12 16:09:17,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:09:17,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-12 16:09:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-12 16:09:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:09:17,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-12 16:09:17,732 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-12 16:09:17,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:17,732 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-12 16:09:17,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:09:17,732 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-12 16:09:17,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:09:17,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:17,733 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:17,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:09:17,734 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:17,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:17,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1613386015, now seen corresponding path program 9 times [2020-10-12 16:09:17,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:17,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038941251] [2020-10-12 16:09:17,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:09:17,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-12 16:09:17,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:09:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:17,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 16:09:17,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:17,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:17,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:17,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:17,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:17,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:17,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:17,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:17,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:17,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:17,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:17,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:17,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:17,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038941251] [2020-10-12 16:09:17,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:17,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:09:17,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370125811] [2020-10-12 16:09:17,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:09:17,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:09:17,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:09:17,927 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-10-12 16:09:17,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:17,990 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-12 16:09:17,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:09:17,991 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-10-12 16:09:17,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:17,992 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:09:17,993 INFO L226 Difference]: Without dead ends: 32 [2020-10-12 16:09:17,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:09:17,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-12 16:09:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-10-12 16:09:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:09:18,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-12 16:09:18,001 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-12 16:09:18,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:18,002 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-12 16:09:18,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:09:18,004 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-12 16:09:18,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:09:18,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:18,006 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:18,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:09:18,007 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:18,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:18,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1154594463, now seen corresponding path program 10 times [2020-10-12 16:09:18,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:18,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686859088] [2020-10-12 16:09:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:18,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:18,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:18,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:09:18,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:18,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-10-12 16:09:18,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:18,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:09:18,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:18,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 16:09:18,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:18,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:18,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:18,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:18,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:18,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:18,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:18,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:18,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:18,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:18,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686859088] [2020-10-12 16:09:18,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:18,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:09:18,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638349398] [2020-10-12 16:09:18,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:09:18,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:09:18,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:09:18,241 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-10-12 16:09:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:18,282 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-10-12 16:09:18,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:09:18,283 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-12 16:09:18,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:18,284 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:09:18,284 INFO L226 Difference]: Without dead ends: 34 [2020-10-12 16:09:18,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:09:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-12 16:09:18,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-10-12 16:09:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:09:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-12 16:09:18,290 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-12 16:09:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:18,290 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-12 16:09:18,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:09:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-12 16:09:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:09:18,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:18,291 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:18,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:09:18,292 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:18,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:18,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1695889699, now seen corresponding path program 11 times [2020-10-12 16:09:18,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:18,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258773807] [2020-10-12 16:09:18,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:18,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:18,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:18,381 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:09:18,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:18,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-12 16:09:18,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:09:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:18,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 16:09:18,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:18,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:18,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:18,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:18,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:18,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:18,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:18,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:18,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:18,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:18,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258773807] [2020-10-12 16:09:18,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:18,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:09:18,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187960925] [2020-10-12 16:09:18,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:09:18,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:09:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:09:18,505 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-10-12 16:09:18,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:18,549 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-10-12 16:09:18,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:09:18,549 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-10-12 16:09:18,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:18,550 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:09:18,550 INFO L226 Difference]: Without dead ends: 36 [2020-10-12 16:09:18,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:09:18,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-12 16:09:18,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-12 16:09:18,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:09:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-12 16:09:18,556 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-12 16:09:18,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:18,557 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-12 16:09:18,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:09:18,557 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-12 16:09:18,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:09:18,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:18,558 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:18,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:09:18,558 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:18,558 INFO L82 PathProgramCache]: Analyzing trace with hash -822034533, now seen corresponding path program 12 times [2020-10-12 16:09:18,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:18,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297032278] [2020-10-12 16:09:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:18,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:18,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:18,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:09:18,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:18,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 100 [2020-10-12 16:09:18,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:09:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:18,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 16:09:18,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:18,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:18,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:18,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:18,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:18,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:18,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:18,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:18,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:18,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:18,807 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:18,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297032278] [2020-10-12 16:09:18,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:18,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:09:18,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036120255] [2020-10-12 16:09:18,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:09:18,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:18,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:09:18,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:09:18,812 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-12 16:09:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:18,889 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-10-12 16:09:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:09:18,890 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-12 16:09:18,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:18,891 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:09:18,891 INFO L226 Difference]: Without dead ends: 38 [2020-10-12 16:09:18,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:09:18,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-12 16:09:18,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-12 16:09:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:09:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-12 16:09:18,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-12 16:09:18,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:18,900 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-12 16:09:18,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:09:18,901 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-12 16:09:18,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:09:18,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:18,901 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:18,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:09:18,902 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:18,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:18,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1434157273, now seen corresponding path program 13 times [2020-10-12 16:09:18,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:18,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311806060] [2020-10-12 16:09:18,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:18,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:19,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:19,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:09:19,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:19,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 108 [2020-10-12 16:09:19,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:19,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:09:19,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:19,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 16:09:19,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:19,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:19,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:19,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:19,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:19,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:19,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:19,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:19,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:19,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:19,183 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:19,183 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311806060] [2020-10-12 16:09:19,183 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:19,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:09:19,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523747005] [2020-10-12 16:09:19,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:09:19,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:19,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:09:19,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:09:19,186 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-10-12 16:09:19,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:19,240 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-10-12 16:09:19,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:09:19,241 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-10-12 16:09:19,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:19,242 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:09:19,242 INFO L226 Difference]: Without dead ends: 40 [2020-10-12 16:09:19,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:09:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-12 16:09:19,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-10-12 16:09:19,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:09:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-12 16:09:19,255 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-12 16:09:19,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:19,255 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-12 16:09:19,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:09:19,255 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-12 16:09:19,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:09:19,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:19,258 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:19,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:09:19,259 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:19,259 INFO L82 PathProgramCache]: Analyzing trace with hash 675998359, now seen corresponding path program 14 times [2020-10-12 16:09:19,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:19,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741629118] [2020-10-12 16:09:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:19,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:19,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:19,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:09:19,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:19,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-12 16:09:19,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:19,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:09:19,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:19,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 16:09:19,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:19,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:19,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:19,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:19,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:19,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:19,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:19,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:19,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:19,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:19,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:19,592 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:19,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741629118] [2020-10-12 16:09:19,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:19,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:09:19,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640030150] [2020-10-12 16:09:19,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:09:19,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:19,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:09:19,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:09:19,595 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-10-12 16:09:19,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:19,679 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-10-12 16:09:19,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:09:19,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-12 16:09:19,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:19,682 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:09:19,682 INFO L226 Difference]: Without dead ends: 42 [2020-10-12 16:09:19,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:09:19,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-12 16:09:19,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-10-12 16:09:19,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:09:19,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-12 16:09:19,694 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-12 16:09:19,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:19,696 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-12 16:09:19,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:09:19,696 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-12 16:09:19,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:09:19,696 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:19,697 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:19,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:09:19,697 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash -2065244971, now seen corresponding path program 15 times [2020-10-12 16:09:19,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:19,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695332685] [2020-10-12 16:09:19,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:19,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:19,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:19,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:09:19,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:19,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 114 [2020-10-12 16:09:19,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:19,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:09:19,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:19,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 16:09:19,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:20,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:20,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:20,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:20,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:20,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:20,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:20,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:20,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:20,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:20,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:20,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:20,047 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:20,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695332685] [2020-10-12 16:09:20,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:20,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:09:20,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134782437] [2020-10-12 16:09:20,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:09:20,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:20,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:09:20,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:09:20,057 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-10-12 16:09:20,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:20,144 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-10-12 16:09:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:09:20,145 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-10-12 16:09:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:20,146 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:09:20,146 INFO L226 Difference]: Without dead ends: 44 [2020-10-12 16:09:20,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:09:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-12 16:09:20,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-10-12 16:09:20,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:09:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-12 16:09:20,157 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-12 16:09:20,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:20,158 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-12 16:09:20,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:09:20,159 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-12 16:09:20,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:09:20,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:20,163 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:20,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:09:20,163 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:20,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:20,164 INFO L82 PathProgramCache]: Analyzing trace with hash 709834643, now seen corresponding path program 16 times [2020-10-12 16:09:20,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:20,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404827187] [2020-10-12 16:09:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:20,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:20,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:20,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:09:20,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:20,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-12 16:09:20,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:09:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:20,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 16:09:20,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:20,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:20,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:20,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:20,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:20,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:20,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:20,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:20,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:20,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:20,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:20,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404827187] [2020-10-12 16:09:20,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:20,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:09:20,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101595533] [2020-10-12 16:09:20,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:09:20,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:20,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:09:20,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:09:20,544 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-10-12 16:09:20,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:20,610 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-10-12 16:09:20,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:09:20,610 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-10-12 16:09:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:20,611 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:09:20,611 INFO L226 Difference]: Without dead ends: 46 [2020-10-12 16:09:20,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:09:20,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-12 16:09:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-10-12 16:09:20,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:09:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-12 16:09:20,625 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-12 16:09:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:20,625 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-12 16:09:20,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:09:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-12 16:09:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:09:20,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:20,627 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:20,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:09:20,628 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash 386652881, now seen corresponding path program 17 times [2020-10-12 16:09:20,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:20,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573615149] [2020-10-12 16:09:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:20,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:20,822 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:20,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:09:20,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:20,823 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-12 16:09:20,823 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:20,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:09:20,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:20,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 16:09:20,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:21,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:21,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:21,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:21,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:21,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:21,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:09:21,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:21,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:21,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:21,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573615149] [2020-10-12 16:09:21,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:21,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:09:21,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364426325] [2020-10-12 16:09:21,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:09:21,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:21,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:09:21,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:09:21,063 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-10-12 16:09:21,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:21,132 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-10-12 16:09:21,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:09:21,134 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-10-12 16:09:21,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:21,134 INFO L225 Difference]: With dead ends: 53 [2020-10-12 16:09:21,135 INFO L226 Difference]: Without dead ends: 48 [2020-10-12 16:09:21,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:09:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-12 16:09:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-12 16:09:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:09:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-12 16:09:21,144 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-12 16:09:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:21,145 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-12 16:09:21,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:09:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-12 16:09:21,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:09:21,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:21,150 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:21,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:09:21,151 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:21,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:21,151 INFO L82 PathProgramCache]: Analyzing trace with hash -953375089, now seen corresponding path program 18 times [2020-10-12 16:09:21,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:21,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762656283] [2020-10-12 16:09:21,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:21,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:21,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:21,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:21,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:09:21,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:21,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-12 16:09:21,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:21,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:09:21,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:21,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 16:09:21,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:21,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:21,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:21,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:21,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:21,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:21,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:21,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:21,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:21,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:21,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:21,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:21,589 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:21,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762656283] [2020-10-12 16:09:21,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:21,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:09:21,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507712281] [2020-10-12 16:09:21,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:09:21,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:21,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:09:21,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:09:21,591 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-10-12 16:09:21,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:21,655 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-10-12 16:09:21,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:09:21,655 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-10-12 16:09:21,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:21,656 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:09:21,656 INFO L226 Difference]: Without dead ends: 50 [2020-10-12 16:09:21,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:09:21,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-12 16:09:21,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-12 16:09:21,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:09:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-12 16:09:21,661 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-12 16:09:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:21,661 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-12 16:09:21,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:09:21,661 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-12 16:09:21,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:09:21,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:21,662 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:21,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:09:21,662 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:21,663 INFO L82 PathProgramCache]: Analyzing trace with hash -230065459, now seen corresponding path program 19 times [2020-10-12 16:09:21,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:21,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525800390] [2020-10-12 16:09:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:21,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:21,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:21,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:09:21,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:21,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-12 16:09:21,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:21,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:09:21,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:21,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 16:09:21,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:22,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:22,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:22,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:22,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:22,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:22,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:22,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:22,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:22,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:22,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:22,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:22,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525800390] [2020-10-12 16:09:22,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:22,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:09:22,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598522140] [2020-10-12 16:09:22,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:09:22,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:22,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:09:22,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:09:22,144 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-10-12 16:09:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:22,211 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-10-12 16:09:22,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:09:22,212 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-12 16:09:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:22,212 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:09:22,212 INFO L226 Difference]: Without dead ends: 52 [2020-10-12 16:09:22,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:09:22,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-12 16:09:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-12 16:09:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:09:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-12 16:09:22,219 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-12 16:09:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:22,220 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-12 16:09:22,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:09:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-12 16:09:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:09:22,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:22,222 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:22,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:09:22,222 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:22,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:22,222 INFO L82 PathProgramCache]: Analyzing trace with hash -914212981, now seen corresponding path program 20 times [2020-10-12 16:09:22,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:22,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767722333] [2020-10-12 16:09:22,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:22,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:22,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:22,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:09:22,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:22,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 170 [2020-10-12 16:09:22,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:09:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:22,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 16:09:22,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:22,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:22,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:22,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:22,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:22,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:22,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:22,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:22,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:22,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:22,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:22,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:22,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:22,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767722333] [2020-10-12 16:09:22,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:22,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:09:22,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74934539] [2020-10-12 16:09:22,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:09:22,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:22,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:09:22,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:09:22,721 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-10-12 16:09:22,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:22,790 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-10-12 16:09:22,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:09:22,790 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-10-12 16:09:22,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:22,791 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:09:22,791 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 16:09:22,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:09:22,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 16:09:22,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-12 16:09:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:09:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-12 16:09:22,802 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-12 16:09:22,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:22,802 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-12 16:09:22,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:09:22,803 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-12 16:09:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:09:22,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:22,805 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:22,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:09:22,805 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:22,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:22,806 INFO L82 PathProgramCache]: Analyzing trace with hash -1249985335, now seen corresponding path program 21 times [2020-10-12 16:09:22,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:22,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61368585] [2020-10-12 16:09:22,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:22,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:22,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:22,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:09:22,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:22,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-12 16:09:22,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:22,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:09:22,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:22,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 16:09:22,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:23,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:23,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:23,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:23,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:23,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:23,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:23,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:23,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:23,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:23,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:23,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:23,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61368585] [2020-10-12 16:09:23,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:23,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:09:23,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756257831] [2020-10-12 16:09:23,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:09:23,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:23,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:09:23,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:09:23,285 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-10-12 16:09:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:23,357 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-10-12 16:09:23,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:09:23,359 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-10-12 16:09:23,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:23,360 INFO L225 Difference]: With dead ends: 61 [2020-10-12 16:09:23,360 INFO L226 Difference]: Without dead ends: 56 [2020-10-12 16:09:23,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:09:23,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-12 16:09:23,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-12 16:09:23,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:09:23,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-12 16:09:23,367 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-12 16:09:23,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:23,367 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-12 16:09:23,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:09:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-12 16:09:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:09:23,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:23,368 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:23,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:09:23,368 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:23,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1804670329, now seen corresponding path program 22 times [2020-10-12 16:09:23,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:23,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019237779] [2020-10-12 16:09:23,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:23,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:23,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:23,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:23,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:09:23,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:23,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 191 [2020-10-12 16:09:23,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:23,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:09:23,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:23,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 16:09:23,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:23,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:23,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:23,896 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:23,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:23,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:23,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:23,897 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:23,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:23,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:23,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:23,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:23,902 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:23,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019237779] [2020-10-12 16:09:23,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:23,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:09:23,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116879260] [2020-10-12 16:09:23,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:09:23,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:23,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:09:23,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:09:23,907 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-10-12 16:09:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:23,978 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-10-12 16:09:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:09:23,979 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-10-12 16:09:23,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:23,979 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:09:23,979 INFO L226 Difference]: Without dead ends: 58 [2020-10-12 16:09:23,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:09:23,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-12 16:09:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-12 16:09:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:09:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-12 16:09:23,984 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-12 16:09:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:23,985 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-12 16:09:23,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:09:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-12 16:09:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:09:23,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:23,985 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:23,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:09:23,986 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:23,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:23,986 INFO L82 PathProgramCache]: Analyzing trace with hash 2013962437, now seen corresponding path program 23 times [2020-10-12 16:09:23,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:23,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757335629] [2020-10-12 16:09:23,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:24,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:24,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:24,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:09:24,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:24,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-12 16:09:24,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:24,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:09:24,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:24,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 16:09:24,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:24,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:24,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:24,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:24,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:24,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:24,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:09:24,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:24,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:24,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:24,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757335629] [2020-10-12 16:09:24,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:24,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:09:24,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208846213] [2020-10-12 16:09:24,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:09:24,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:24,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:09:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:09:24,554 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-10-12 16:09:24,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:24,637 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-10-12 16:09:24,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:09:24,637 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-10-12 16:09:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:24,638 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:09:24,638 INFO L226 Difference]: Without dead ends: 60 [2020-10-12 16:09:24,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:09:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-12 16:09:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-12 16:09:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:09:24,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-12 16:09:24,643 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-12 16:09:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:24,645 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-12 16:09:24,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:09:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-12 16:09:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:09:24,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:24,647 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:24,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:09:24,647 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:24,648 INFO L82 PathProgramCache]: Analyzing trace with hash -476987517, now seen corresponding path program 24 times [2020-10-12 16:09:24,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:24,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012332274] [2020-10-12 16:09:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:24,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:24,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:24,831 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:24,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:09:24,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:24,832 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-12 16:09:24,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:24,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:09:24,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:24,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 16:09:24,833 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:25,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:25,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:25,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:25,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:25,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:25,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:25,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:25,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:25,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:25,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:25,205 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:25,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012332274] [2020-10-12 16:09:25,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:25,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:09:25,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516993551] [2020-10-12 16:09:25,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:09:25,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:25,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:09:25,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:09:25,207 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-10-12 16:09:25,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:25,292 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-10-12 16:09:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:09:25,292 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-10-12 16:09:25,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:25,293 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:09:25,293 INFO L226 Difference]: Without dead ends: 62 [2020-10-12 16:09:25,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:09:25,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-12 16:09:25,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-12 16:09:25,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:09:25,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-12 16:09:25,298 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-12 16:09:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:25,298 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-12 16:09:25,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:09:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-12 16:09:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:09:25,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:25,299 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:25,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:09:25,299 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:25,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:25,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1983109439, now seen corresponding path program 25 times [2020-10-12 16:09:25,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:25,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756197036] [2020-10-12 16:09:25,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:25,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:25,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:25,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:09:25,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:25,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 187 [2020-10-12 16:09:25,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:09:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:25,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 16:09:25,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:25,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:25,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:25,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:25,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:25,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:25,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:25,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:25,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:25,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:25,889 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:25,889 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756197036] [2020-10-12 16:09:25,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:25,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:09:25,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615900435] [2020-10-12 16:09:25,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:09:25,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:25,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:09:25,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:09:25,892 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-10-12 16:09:25,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:25,981 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-10-12 16:09:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:09:25,983 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-10-12 16:09:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:25,984 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:09:25,984 INFO L226 Difference]: Without dead ends: 64 [2020-10-12 16:09:25,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:09:25,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-12 16:09:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-12 16:09:25,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:09:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-12 16:09:25,989 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-12 16:09:25,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:25,990 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-12 16:09:25,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:09:25,990 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-12 16:09:25,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:09:25,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:25,991 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:25,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:09:25,991 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:25,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:25,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1962297729, now seen corresponding path program 26 times [2020-10-12 16:09:25,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:25,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161891525] [2020-10-12 16:09:25,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:25,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:09:26,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:26,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-12 16:09:26,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:09:26,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:26,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 16:09:26,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:26,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:26,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:26,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:26,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:26,656 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:26,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161891525] [2020-10-12 16:09:26,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:26,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:09:26,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316154682] [2020-10-12 16:09:26,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:09:26,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:09:26,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:09:26,658 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-10-12 16:09:26,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:26,764 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-10-12 16:09:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:09:26,765 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-10-12 16:09:26,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:26,766 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:09:26,766 INFO L226 Difference]: Without dead ends: 66 [2020-10-12 16:09:26,766 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:09:26,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-12 16:09:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-12 16:09:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:09:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-12 16:09:26,770 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-12 16:09:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:26,770 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-12 16:09:26,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:09:26,770 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-12 16:09:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:09:26,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:26,771 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:26,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:09:26,771 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 857886397, now seen corresponding path program 27 times [2020-10-12 16:09:26,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:26,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066445003] [2020-10-12 16:09:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:26,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:26,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:26,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:09:26,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:26,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-12 16:09:26,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:09:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:26,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 16:09:26,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:27,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:27,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:27,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:27,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:27,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:27,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:27,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:27,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:27,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:27,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:27,408 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:27,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066445003] [2020-10-12 16:09:27,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:27,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:09:27,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123836723] [2020-10-12 16:09:27,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:09:27,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:27,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:09:27,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:09:27,410 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-10-12 16:09:27,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:27,510 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-10-12 16:09:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:09:27,510 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-10-12 16:09:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:27,511 INFO L225 Difference]: With dead ends: 73 [2020-10-12 16:09:27,511 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 16:09:27,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:09:27,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 16:09:27,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-12 16:09:27,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:09:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-12 16:09:27,517 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-12 16:09:27,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:27,517 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-12 16:09:27,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:09:27,517 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-12 16:09:27,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:09:27,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:27,518 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:27,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:09:27,519 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:27,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:27,519 INFO L82 PathProgramCache]: Analyzing trace with hash 930467707, now seen corresponding path program 28 times [2020-10-12 16:09:27,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:27,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870981422] [2020-10-12 16:09:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:27,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:27,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:27,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:09:27,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:27,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 204 [2020-10-12 16:09:27,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:27,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:09:27,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:27,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 16:09:27,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:28,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:28,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:28,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:28,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:28,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:28,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:28,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:28,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:28,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:28,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:28,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:28,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870981422] [2020-10-12 16:09:28,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:28,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:09:28,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504780515] [2020-10-12 16:09:28,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:09:28,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:28,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:09:28,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:09:28,206 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-10-12 16:09:28,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:28,325 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-10-12 16:09:28,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:09:28,326 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-10-12 16:09:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:28,327 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:09:28,327 INFO L226 Difference]: Without dead ends: 70 [2020-10-12 16:09:28,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:09:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-12 16:09:28,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-12 16:09:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:09:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-12 16:09:28,332 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-12 16:09:28,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:28,333 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-12 16:09:28,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:09:28,333 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-12 16:09:28,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 16:09:28,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:28,334 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:28,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:09:28,334 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:28,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:28,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1961629881, now seen corresponding path program 29 times [2020-10-12 16:09:28,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:28,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349121858] [2020-10-12 16:09:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:28,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:28,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:28,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:09:28,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:28,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 223 [2020-10-12 16:09:28,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:09:28,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:28,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 16:09:28,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:29,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:29,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:29,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:29,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:29,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:29,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:29,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:29,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:29,140 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:29,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349121858] [2020-10-12 16:09:29,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:29,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:09:29,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471520577] [2020-10-12 16:09:29,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:09:29,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:29,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:09:29,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:09:29,143 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-10-12 16:09:29,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:29,233 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-10-12 16:09:29,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:09:29,234 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-10-12 16:09:29,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:29,235 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:09:29,235 INFO L226 Difference]: Without dead ends: 72 [2020-10-12 16:09:29,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:09:29,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-12 16:09:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-12 16:09:29,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:09:29,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-12 16:09:29,239 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-12 16:09:29,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:29,239 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-12 16:09:29,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:09:29,240 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-12 16:09:29,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:09:29,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:29,240 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:29,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:09:29,241 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:29,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:29,241 INFO L82 PathProgramCache]: Analyzing trace with hash 771033719, now seen corresponding path program 30 times [2020-10-12 16:09:29,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:29,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857432369] [2020-10-12 16:09:29,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:29,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:29,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:09:29,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:29,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-12 16:09:29,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:09:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:29,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 16:09:29,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:29,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:29,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:29,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:29,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:29,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:29,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:29,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:29,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:29,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:30,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857432369] [2020-10-12 16:09:30,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:30,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:09:30,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204645304] [2020-10-12 16:09:30,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:09:30,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:30,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:09:30,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:09:30,008 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-10-12 16:09:30,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:30,125 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-10-12 16:09:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:09:30,126 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-10-12 16:09:30,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:30,127 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:09:30,127 INFO L226 Difference]: Without dead ends: 74 [2020-10-12 16:09:30,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:09:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-12 16:09:30,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-12 16:09:30,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:09:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-12 16:09:30,131 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-12 16:09:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:30,132 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-12 16:09:30,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:09:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-12 16:09:30,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:09:30,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:30,133 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:30,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:09:30,133 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:30,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:30,134 INFO L82 PathProgramCache]: Analyzing trace with hash -930577227, now seen corresponding path program 31 times [2020-10-12 16:09:30,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:30,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810824072] [2020-10-12 16:09:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:30,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:30,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:09:30,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:30,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-12 16:09:30,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:30,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:09:30,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:30,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 16:09:30,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:30,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:30,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:30,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:30,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:30,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:30,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:30,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:30,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:30,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:30,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:30,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:30,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:31,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810824072] [2020-10-12 16:09:31,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:31,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:09:31,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887258294] [2020-10-12 16:09:31,008 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:09:31,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:31,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:09:31,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:09:31,010 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-10-12 16:09:31,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:31,150 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-10-12 16:09:31,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:09:31,150 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-10-12 16:09:31,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:31,152 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:09:31,152 INFO L226 Difference]: Without dead ends: 76 [2020-10-12 16:09:31,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:09:31,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-12 16:09:31,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-12 16:09:31,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:09:31,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-12 16:09:31,159 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-12 16:09:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:31,159 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-12 16:09:31,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:09:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-12 16:09:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:09:31,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:31,161 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:31,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:09:31,162 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash 203843443, now seen corresponding path program 32 times [2020-10-12 16:09:31,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:31,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185075576] [2020-10-12 16:09:31,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:31,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:31,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:31,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:31,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:09:31,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:31,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-12 16:09:31,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:09:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:31,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 16:09:31,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:32,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:32,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:32,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:32,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:32,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:32,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:32,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:32,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:32,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:32,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185075576] [2020-10-12 16:09:32,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:32,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:09:32,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911049048] [2020-10-12 16:09:32,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:09:32,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:32,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:09:32,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:09:32,158 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-12 16:09:32,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:32,280 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-10-12 16:09:32,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:09:32,280 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-12 16:09:32,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:32,281 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:09:32,281 INFO L226 Difference]: Without dead ends: 78 [2020-10-12 16:09:32,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:09:32,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-12 16:09:32,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-12 16:09:32,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 16:09:32,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-10-12 16:09:32,289 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-10-12 16:09:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:32,290 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-10-12 16:09:32,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:09:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-10-12 16:09:32,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 16:09:32,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:32,291 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:32,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:09:32,291 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:32,292 INFO L82 PathProgramCache]: Analyzing trace with hash -539585871, now seen corresponding path program 33 times [2020-10-12 16:09:32,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:32,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212233034] [2020-10-12 16:09:32,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:32,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:32,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:32,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 16:09:32,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:32,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-12 16:09:32,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:09:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:32,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 16:09:32,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:33,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:33,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:33,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:33,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:33,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:33,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:33,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:33,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:33,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:33,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:33,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:33,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:33,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212233034] [2020-10-12 16:09:33,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:33,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:09:33,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264287687] [2020-10-12 16:09:33,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:09:33,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:33,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:09:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:09:33,277 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-10-12 16:09:33,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:33,370 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-10-12 16:09:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:09:33,370 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-10-12 16:09:33,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:33,372 INFO L225 Difference]: With dead ends: 85 [2020-10-12 16:09:33,373 INFO L226 Difference]: Without dead ends: 80 [2020-10-12 16:09:33,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:09:33,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-12 16:09:33,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-12 16:09:33,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 16:09:33,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-12 16:09:33,379 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-10-12 16:09:33,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:33,380 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-12 16:09:33,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:09:33,380 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-12 16:09:33,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:09:33,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:33,381 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:33,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:09:33,381 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:33,382 INFO L82 PathProgramCache]: Analyzing trace with hash -2010585489, now seen corresponding path program 34 times [2020-10-12 16:09:33,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:33,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157296329] [2020-10-12 16:09:33,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:33,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:33,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:33,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 16:09:33,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:33,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 281 [2020-10-12 16:09:33,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:33,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:09:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:33,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 16:09:33,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:34,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:34,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:34,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:34,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:34,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:34,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:34,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:34,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:34,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157296329] [2020-10-12 16:09:34,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:34,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:09:34,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554376562] [2020-10-12 16:09:34,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:09:34,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:34,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:09:34,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:09:34,369 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-10-12 16:09:34,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:34,500 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-10-12 16:09:34,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:09:34,501 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-10-12 16:09:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:34,502 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:09:34,502 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 16:09:34,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:09:34,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 16:09:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-12 16:09:34,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 16:09:34,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-12 16:09:34,508 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-12 16:09:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:34,508 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-12 16:09:34,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:09:34,509 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-12 16:09:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 16:09:34,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:34,510 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:34,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:09:34,511 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:34,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:34,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1697989293, now seen corresponding path program 35 times [2020-10-12 16:09:34,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:34,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465532683] [2020-10-12 16:09:34,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:34,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:34,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:34,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:09:34,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:34,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 350 [2020-10-12 16:09:34,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:34,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:09:34,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:34,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 16:09:34,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:35,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:35,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:35,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:35,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:35,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:35,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:35,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:35,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:35,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:35,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:35,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:35,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:35,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465532683] [2020-10-12 16:09:35,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:35,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:09:35,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851186271] [2020-10-12 16:09:35,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:09:35,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:09:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:09:35,596 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-10-12 16:09:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:35,722 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-10-12 16:09:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:09:35,722 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-10-12 16:09:35,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:35,723 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:09:35,723 INFO L226 Difference]: Without dead ends: 84 [2020-10-12 16:09:35,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:09:35,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-12 16:09:35,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-12 16:09:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:09:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-12 16:09:35,728 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-12 16:09:35,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:35,728 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-12 16:09:35,728 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:09:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-12 16:09:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 16:09:35,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:35,729 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:35,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:09:35,729 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:35,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:35,730 INFO L82 PathProgramCache]: Analyzing trace with hash 815499115, now seen corresponding path program 36 times [2020-10-12 16:09:35,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:35,730 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580543569] [2020-10-12 16:09:35,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:35,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:35,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:35,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 16:09:35,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:35,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 246 [2020-10-12 16:09:35,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:09:35,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:35,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-12 16:09:35,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:36,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:36,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:36,747 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:36,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:36,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:36,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:36,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:36,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:36,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580543569] [2020-10-12 16:09:36,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:36,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:09:36,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293176025] [2020-10-12 16:09:36,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:09:36,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:36,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:09:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:09:36,757 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-10-12 16:09:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:36,881 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-10-12 16:09:36,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:09:36,887 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-10-12 16:09:36,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:36,888 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:09:36,888 INFO L226 Difference]: Without dead ends: 86 [2020-10-12 16:09:36,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:09:36,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-12 16:09:36,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-12 16:09:36,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:09:36,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-12 16:09:36,893 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-12 16:09:36,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:36,894 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-12 16:09:36,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:09:36,895 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-12 16:09:36,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:09:36,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:36,896 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:36,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:09:36,897 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:36,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:36,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1149004631, now seen corresponding path program 37 times [2020-10-12 16:09:36,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:36,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107888289] [2020-10-12 16:09:36,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:36,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:36,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:37,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 16:09:37,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:37,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 259 [2020-10-12 16:09:37,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:09:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:37,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-12 16:09:37,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:37,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:37,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:37,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:37,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:37,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:37,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:37,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:37,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:37,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:37,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:37,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107888289] [2020-10-12 16:09:37,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:37,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:09:37,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358817206] [2020-10-12 16:09:37,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:09:37,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:37,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:09:37,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:09:37,963 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states. [2020-10-12 16:09:38,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:38,115 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2020-10-12 16:09:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:09:38,120 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 84 [2020-10-12 16:09:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:38,121 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:09:38,121 INFO L226 Difference]: Without dead ends: 88 [2020-10-12 16:09:38,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:09:38,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-12 16:09:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-12 16:09:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 16:09:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-12 16:09:38,126 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-12 16:09:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:38,126 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-12 16:09:38,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:09:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-12 16:09:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 16:09:38,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:38,127 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:38,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:09:38,127 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:38,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:38,128 INFO L82 PathProgramCache]: Analyzing trace with hash 748505703, now seen corresponding path program 38 times [2020-10-12 16:09:38,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:38,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781348366] [2020-10-12 16:09:38,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:38,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:38,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:38,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:09:38,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:38,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 248 [2020-10-12 16:09:38,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:38,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:09:38,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:38,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 16:09:38,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:39,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:39,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:39,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:39,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:39,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:39,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:39,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:39,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:39,249 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1781348366] [2020-10-12 16:09:39,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:39,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:09:39,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074649593] [2020-10-12 16:09:39,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:09:39,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:39,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:09:39,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:09:39,251 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 41 states. [2020-10-12 16:09:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:39,413 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-10-12 16:09:39,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:09:39,414 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 86 [2020-10-12 16:09:39,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:39,415 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:09:39,415 INFO L226 Difference]: Without dead ends: 90 [2020-10-12 16:09:39,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:09:39,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-12 16:09:39,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-12 16:09:39,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 16:09:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-12 16:09:39,421 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-12 16:09:39,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:39,421 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-12 16:09:39,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:09:39,421 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-12 16:09:39,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 16:09:39,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:39,422 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:39,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:09:39,422 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:39,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1105164123, now seen corresponding path program 39 times [2020-10-12 16:09:39,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:39,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901810511] [2020-10-12 16:09:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:39,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:39,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:39,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 16:09:39,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:39,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-10-12 16:09:39,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:09:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:39,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 16:09:39,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:40,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:40,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:40,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:40,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:40,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:40,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:40,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:40,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:40,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:40,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:40,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:40,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901810511] [2020-10-12 16:09:40,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:40,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:09:40,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386682717] [2020-10-12 16:09:40,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:09:40,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:40,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:09:40,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:09:40,585 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand 42 states. [2020-10-12 16:09:40,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:40,730 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2020-10-12 16:09:40,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:09:40,730 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 88 [2020-10-12 16:09:40,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:40,731 INFO L225 Difference]: With dead ends: 97 [2020-10-12 16:09:40,732 INFO L226 Difference]: Without dead ends: 92 [2020-10-12 16:09:40,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:09:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-12 16:09:40,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-12 16:09:40,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:09:40,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-10-12 16:09:40,737 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2020-10-12 16:09:40,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:40,737 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-10-12 16:09:40,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:09:40,738 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-10-12 16:09:40,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:09:40,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:40,739 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:40,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:09:40,739 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:40,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:40,739 INFO L82 PathProgramCache]: Analyzing trace with hash -70439069, now seen corresponding path program 40 times [2020-10-12 16:09:40,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:40,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223080675] [2020-10-12 16:09:40,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:40,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:40,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:40,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:40,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:09:40,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:40,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-12 16:09:40,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:09:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:40,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 16:09:40,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:41,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:41,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:41,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:41,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:41,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:41,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:41,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:41,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:41,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:41,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:41,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:41,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223080675] [2020-10-12 16:09:41,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:41,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:09:41,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013624068] [2020-10-12 16:09:41,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:09:41,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:41,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:09:41,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:09:41,924 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 43 states. [2020-10-12 16:09:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:42,076 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-10-12 16:09:42,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:09:42,076 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 90 [2020-10-12 16:09:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:42,077 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:09:42,078 INFO L226 Difference]: Without dead ends: 94 [2020-10-12 16:09:42,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:09:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-12 16:09:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-12 16:09:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:09:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2020-10-12 16:09:42,083 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2020-10-12 16:09:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:42,084 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2020-10-12 16:09:42,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:09:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2020-10-12 16:09:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 16:09:42,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:42,085 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:42,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:09:42,085 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2132074847, now seen corresponding path program 41 times [2020-10-12 16:09:42,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:42,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975591651] [2020-10-12 16:09:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:42,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:42,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:42,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:09:42,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:42,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-12 16:09:42,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:09:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:42,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 16:09:42,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:43,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:43,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:43,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:43,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:43,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:43,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:43,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:43,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:43,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:43,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:43,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:43,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:43,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975591651] [2020-10-12 16:09:43,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:43,299 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:09:43,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023375781] [2020-10-12 16:09:43,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:09:43,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:43,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:09:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:09:43,300 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand 44 states. [2020-10-12 16:09:43,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:43,430 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-10-12 16:09:43,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:09:43,431 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 92 [2020-10-12 16:09:43,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:43,432 INFO L225 Difference]: With dead ends: 101 [2020-10-12 16:09:43,433 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 16:09:43,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:09:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 16:09:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-12 16:09:43,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:09:43,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2020-10-12 16:09:43,438 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2020-10-12 16:09:43,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:43,439 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2020-10-12 16:09:43,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:09:43,439 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2020-10-12 16:09:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 16:09:43,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:43,441 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:43,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:09:43,441 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:43,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:43,441 INFO L82 PathProgramCache]: Analyzing trace with hash 910833247, now seen corresponding path program 42 times [2020-10-12 16:09:43,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:43,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934752498] [2020-10-12 16:09:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:43,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:43,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:43,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 16:09:43,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:43,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 242 [2020-10-12 16:09:43,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:09:43,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:43,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 16:09:43,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:44,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:44,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:44,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:44,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:44,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:44,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:44,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:44,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:44,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:44,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:44,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934752498] [2020-10-12 16:09:44,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:44,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:09:44,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681813770] [2020-10-12 16:09:44,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:09:44,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:09:44,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:09:44,719 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand 45 states. [2020-10-12 16:09:44,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:44,872 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-10-12 16:09:44,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:09:44,874 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 94 [2020-10-12 16:09:44,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:44,875 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:09:44,875 INFO L226 Difference]: Without dead ends: 98 [2020-10-12 16:09:44,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:09:44,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-12 16:09:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-12 16:09:44,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 16:09:44,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-10-12 16:09:44,881 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2020-10-12 16:09:44,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:44,881 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-10-12 16:09:44,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:09:44,881 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-10-12 16:09:44,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:09:44,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:44,882 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:44,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:09:44,882 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:44,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:44,883 INFO L82 PathProgramCache]: Analyzing trace with hash 272783005, now seen corresponding path program 43 times [2020-10-12 16:09:44,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:44,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1511273367] [2020-10-12 16:09:44,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:44,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:45,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:45,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 16:09:45,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-12 16:09:45,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:09:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:45,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-12 16:09:45,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:46,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:46,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:46,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:46,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:46,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:46,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:46,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:46,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:46,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:46,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1511273367] [2020-10-12 16:09:46,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:46,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:09:46,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250754827] [2020-10-12 16:09:46,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:09:46,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:46,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:09:46,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:09:46,337 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 46 states. [2020-10-12 16:09:46,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:46,485 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-10-12 16:09:46,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:09:46,485 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 96 [2020-10-12 16:09:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:46,487 INFO L225 Difference]: With dead ends: 105 [2020-10-12 16:09:46,487 INFO L226 Difference]: Without dead ends: 100 [2020-10-12 16:09:46,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:09:46,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-12 16:09:46,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-12 16:09:46,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 16:09:46,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-10-12 16:09:46,490 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2020-10-12 16:09:46,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:46,490 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-10-12 16:09:46,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:09:46,490 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-10-12 16:09:46,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 16:09:46,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:46,491 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:46,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:09:46,491 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:46,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:46,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1286823771, now seen corresponding path program 44 times [2020-10-12 16:09:46,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:46,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [768301232] [2020-10-12 16:09:46,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:46,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:46,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:46,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:46,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 16:09:46,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:46,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 260 [2020-10-12 16:09:46,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:46,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:09:46,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:46,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 16:09:46,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:47,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:47,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:47,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:47,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:47,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:47,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:47,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:47,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:47,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:47,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:47,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [768301232] [2020-10-12 16:09:47,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:47,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:09:47,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311192466] [2020-10-12 16:09:47,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:09:47,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:47,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:09:47,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:09:47,888 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 47 states. [2020-10-12 16:09:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:48,052 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-10-12 16:09:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:09:48,052 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 98 [2020-10-12 16:09:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:48,054 INFO L225 Difference]: With dead ends: 107 [2020-10-12 16:09:48,054 INFO L226 Difference]: Without dead ends: 102 [2020-10-12 16:09:48,054 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:09:48,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-12 16:09:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-12 16:09:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 16:09:48,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2020-10-12 16:09:48,059 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2020-10-12 16:09:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:48,059 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2020-10-12 16:09:48,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:09:48,059 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2020-10-12 16:09:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 16:09:48,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:48,060 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:48,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:09:48,060 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:48,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:48,061 INFO L82 PathProgramCache]: Analyzing trace with hash 822423705, now seen corresponding path program 45 times [2020-10-12 16:09:48,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:48,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683986422] [2020-10-12 16:09:48,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:48,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:48,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:48,363 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 16:09:48,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:48,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 292 [2020-10-12 16:09:48,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:09:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:48,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 92 [2020-10-12 16:09:48,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:49,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:49,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:49,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:49,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:49,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:49,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:49,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:49,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:49,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683986422] [2020-10-12 16:09:49,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:49,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:09:49,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620911518] [2020-10-12 16:09:49,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:09:49,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:49,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:09:49,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:09:49,556 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand 48 states. [2020-10-12 16:09:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:49,720 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2020-10-12 16:09:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:09:49,720 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 100 [2020-10-12 16:09:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:49,721 INFO L225 Difference]: With dead ends: 109 [2020-10-12 16:09:49,721 INFO L226 Difference]: Without dead ends: 104 [2020-10-12 16:09:49,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:09:49,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-12 16:09:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-12 16:09:49,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:09:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2020-10-12 16:09:49,726 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2020-10-12 16:09:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:49,727 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2020-10-12 16:09:49,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:09:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2020-10-12 16:09:49,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 16:09:49,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:49,728 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:49,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:09:49,728 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:49,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:49,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1210559063, now seen corresponding path program 46 times [2020-10-12 16:09:49,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:49,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198443108] [2020-10-12 16:09:49,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:49,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:50,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:50,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 16:09:50,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:50,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 344 [2020-10-12 16:09:50,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:50,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:09:50,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:50,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-12 16:09:50,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:51,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:51,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:51,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:51,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:51,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:51,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:51,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:09:51,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:51,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:51,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198443108] [2020-10-12 16:09:51,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:51,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:09:51,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941462290] [2020-10-12 16:09:51,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:09:51,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:51,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:09:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:09:51,298 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand 49 states. [2020-10-12 16:09:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:51,447 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-10-12 16:09:51,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:09:51,447 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 102 [2020-10-12 16:09:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:51,449 INFO L225 Difference]: With dead ends: 111 [2020-10-12 16:09:51,449 INFO L226 Difference]: Without dead ends: 106 [2020-10-12 16:09:51,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:09:51,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-12 16:09:51,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-12 16:09:51,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 16:09:51,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2020-10-12 16:09:51,456 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2020-10-12 16:09:51,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:51,456 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2020-10-12 16:09:51,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:09:51,456 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2020-10-12 16:09:51,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 16:09:51,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:51,457 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:51,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:09:51,457 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:51,458 INFO L82 PathProgramCache]: Analyzing trace with hash 546483349, now seen corresponding path program 47 times [2020-10-12 16:09:51,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:51,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37601153] [2020-10-12 16:09:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:51,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:51,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:51,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:51,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 16:09:51,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:51,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 443 [2020-10-12 16:09:51,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:09:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:51,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-12 16:09:51,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:53,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:53,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:53,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:53,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:53,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:53,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:53,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:53,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:53,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37601153] [2020-10-12 16:09:53,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:53,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:09:53,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537828544] [2020-10-12 16:09:53,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:09:53,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:53,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:09:53,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:09:53,188 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand 50 states. [2020-10-12 16:09:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:53,367 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2020-10-12 16:09:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:09:53,367 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 104 [2020-10-12 16:09:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:53,368 INFO L225 Difference]: With dead ends: 113 [2020-10-12 16:09:53,368 INFO L226 Difference]: Without dead ends: 108 [2020-10-12 16:09:53,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:09:53,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-12 16:09:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-12 16:09:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 16:09:53,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-10-12 16:09:53,373 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2020-10-12 16:09:53,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:53,373 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-10-12 16:09:53,373 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:09:53,373 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-10-12 16:09:53,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 16:09:53,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:53,374 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:53,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:09:53,375 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:53,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1975117997, now seen corresponding path program 48 times [2020-10-12 16:09:53,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:53,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644819139] [2020-10-12 16:09:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:53,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:53,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:53,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 16:09:53,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:53,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 401 [2020-10-12 16:09:53,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 16:09:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:53,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-12 16:09:53,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:09:55,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:55,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:55,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:55,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:55,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:55,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:55,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:55,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:55,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:55,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:55,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:55,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644819139] [2020-10-12 16:09:55,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:55,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:09:55,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327428077] [2020-10-12 16:09:55,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:09:55,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:55,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:09:55,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:09:55,125 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 51 states. [2020-10-12 16:09:55,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:55,301 INFO L93 Difference]: Finished difference Result 115 states and 115 transitions. [2020-10-12 16:09:55,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:09:55,301 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 106 [2020-10-12 16:09:55,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:55,302 INFO L225 Difference]: With dead ends: 115 [2020-10-12 16:09:55,302 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 16:09:55,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:09:55,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 16:09:55,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-12 16:09:55,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 16:09:55,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2020-10-12 16:09:55,309 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2020-10-12 16:09:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:55,309 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2020-10-12 16:09:55,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:09:55,310 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2020-10-12 16:09:55,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:09:55,310 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:55,310 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:55,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:09:55,311 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:55,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:55,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1422510737, now seen corresponding path program 49 times [2020-10-12 16:09:55,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:55,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859271265] [2020-10-12 16:09:55,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:55,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:55,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:55,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 16:09:55,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:55,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-12 16:09:55,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:55,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:09:55,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:55,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-12 16:09:55,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:57,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:57,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:57,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:57,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:57,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:57,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:57,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:57,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:57,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859271265] [2020-10-12 16:09:57,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:57,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:09:57,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937328562] [2020-10-12 16:09:57,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:09:57,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:57,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:09:57,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:09:57,090 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand 52 states. [2020-10-12 16:09:57,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:57,250 INFO L93 Difference]: Finished difference Result 117 states and 117 transitions. [2020-10-12 16:09:57,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:09:57,251 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 108 [2020-10-12 16:09:57,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:57,252 INFO L225 Difference]: With dead ends: 117 [2020-10-12 16:09:57,252 INFO L226 Difference]: Without dead ends: 112 [2020-10-12 16:09:57,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:09:57,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-12 16:09:57,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-12 16:09:57,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 16:09:57,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2020-10-12 16:09:57,257 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2020-10-12 16:09:57,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:57,257 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2020-10-12 16:09:57,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:09:57,258 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2020-10-12 16:09:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 16:09:57,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:57,259 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:57,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:09:57,259 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:57,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:57,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1926388145, now seen corresponding path program 50 times [2020-10-12 16:09:57,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:57,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598383672] [2020-10-12 16:09:57,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:57,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:57,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:57,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 16:09:57,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:57,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-12 16:09:57,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:57,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:09:57,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:57,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-12 16:09:57,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:59,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:09:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:59,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:59,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:59,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:09:59,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:59,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:09:59,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:59,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:09:59,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:09:59,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:09:59,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:09:59,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:09:59,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598383672] [2020-10-12 16:09:59,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:09:59,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:09:59,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522167639] [2020-10-12 16:09:59,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:09:59,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:09:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:09:59,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:09:59,092 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand 53 states. [2020-10-12 16:09:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:09:59,249 INFO L93 Difference]: Finished difference Result 119 states and 119 transitions. [2020-10-12 16:09:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:09:59,250 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 110 [2020-10-12 16:09:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:09:59,253 INFO L225 Difference]: With dead ends: 119 [2020-10-12 16:09:59,253 INFO L226 Difference]: Without dead ends: 114 [2020-10-12 16:09:59,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:09:59,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-12 16:09:59,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-12 16:09:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 16:09:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2020-10-12 16:09:59,267 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2020-10-12 16:09:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:09:59,268 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2020-10-12 16:09:59,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:09:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2020-10-12 16:09:59,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 16:09:59,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:09:59,272 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:09:59,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:09:59,272 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:09:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:09:59,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1007258253, now seen corresponding path program 51 times [2020-10-12 16:09:59,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:09:59,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786020708] [2020-10-12 16:09:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:09:59,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:09:59,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:09:59,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:09:59,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 16:09:59,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:09:59,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 641 [2020-10-12 16:09:59,931 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:09:59,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:09:59,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:09:59,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 104 [2020-10-12 16:09:59,932 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:01,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:01,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:01,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:01,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:01,437 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:01,437 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:01,437 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:01,438 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:01,438 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:01,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:01,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786020708] [2020-10-12 16:10:01,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:01,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:10:01,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558578959] [2020-10-12 16:10:01,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:10:01,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:01,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:10:01,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:10:01,451 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand 54 states. [2020-10-12 16:10:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:01,651 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-10-12 16:10:01,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:10:01,652 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 112 [2020-10-12 16:10:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:01,652 INFO L225 Difference]: With dead ends: 121 [2020-10-12 16:10:01,652 INFO L226 Difference]: Without dead ends: 116 [2020-10-12 16:10:01,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:10:01,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-12 16:10:01,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-12 16:10:01,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 16:10:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-10-12 16:10:01,657 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2020-10-12 16:10:01,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:01,657 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-10-12 16:10:01,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:10:01,658 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-10-12 16:10:01,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 16:10:01,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:01,658 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:01,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:10:01,659 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:01,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:01,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1552066741, now seen corresponding path program 52 times [2020-10-12 16:10:01,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:01,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296851509] [2020-10-12 16:10:01,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:01,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:02,074 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:02,074 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 16:10:02,074 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:02,074 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-12 16:10:02,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 16:10:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:02,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 16:10:02,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:03,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:03,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:03,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:03,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:03,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:03,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:03,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:03,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:03,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:03,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:03,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:03,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296851509] [2020-10-12 16:10:03,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:03,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 16:10:03,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005199204] [2020-10-12 16:10:03,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 16:10:03,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:03,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 16:10:03,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:10:03,642 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 55 states. [2020-10-12 16:10:03,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:03,844 INFO L93 Difference]: Finished difference Result 123 states and 123 transitions. [2020-10-12 16:10:03,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:10:03,845 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 114 [2020-10-12 16:10:03,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:03,846 INFO L225 Difference]: With dead ends: 123 [2020-10-12 16:10:03,846 INFO L226 Difference]: Without dead ends: 118 [2020-10-12 16:10:03,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:10:03,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-12 16:10:03,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-12 16:10:03,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 16:10:03,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-10-12 16:10:03,851 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2020-10-12 16:10:03,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:03,852 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-10-12 16:10:03,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 16:10:03,852 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-10-12 16:10:03,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 16:10:03,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:03,853 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:03,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:10:03,853 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:03,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash -47125367, now seen corresponding path program 53 times [2020-10-12 16:10:03,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:03,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009716079] [2020-10-12 16:10:03,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:03,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:04,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:04,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 16:10:04,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:04,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 442 [2020-10-12 16:10:04,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:10:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:04,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-12 16:10:04,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:05,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:05,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:05,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:05,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:05,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:05,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:05,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:05,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:05,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:05,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:05,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:05,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009716079] [2020-10-12 16:10:05,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:05,889 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:10:05,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738977512] [2020-10-12 16:10:05,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:10:05,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:05,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:10:05,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:10:05,890 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 56 states. [2020-10-12 16:10:06,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:06,122 INFO L93 Difference]: Finished difference Result 125 states and 125 transitions. [2020-10-12 16:10:06,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:10:06,122 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 116 [2020-10-12 16:10:06,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:06,123 INFO L225 Difference]: With dead ends: 125 [2020-10-12 16:10:06,123 INFO L226 Difference]: Without dead ends: 120 [2020-10-12 16:10:06,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:10:06,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-12 16:10:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-12 16:10:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 16:10:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2020-10-12 16:10:06,128 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2020-10-12 16:10:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:06,128 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2020-10-12 16:10:06,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:10:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2020-10-12 16:10:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 16:10:06,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:06,130 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:06,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:10:06,131 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:06,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:06,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1202443705, now seen corresponding path program 54 times [2020-10-12 16:10:06,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:06,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359182192] [2020-10-12 16:10:06,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:06,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:06,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:06,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 16:10:06,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:06,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 429 [2020-10-12 16:10:06,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:06,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:10:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:06,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-12 16:10:06,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:08,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:08,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:08,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:08,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:08,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:08,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:08,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:08,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:08,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:08,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:08,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:08,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359182192] [2020-10-12 16:10:08,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:08,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:10:08,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440537354] [2020-10-12 16:10:08,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:10:08,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:08,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:10:08,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:10:08,299 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand 57 states. [2020-10-12 16:10:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:08,507 INFO L93 Difference]: Finished difference Result 127 states and 127 transitions. [2020-10-12 16:10:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:10:08,507 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 118 [2020-10-12 16:10:08,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:08,508 INFO L225 Difference]: With dead ends: 127 [2020-10-12 16:10:08,509 INFO L226 Difference]: Without dead ends: 122 [2020-10-12 16:10:08,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:10:08,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-12 16:10:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-12 16:10:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 16:10:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2020-10-12 16:10:08,513 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2020-10-12 16:10:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:08,513 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2020-10-12 16:10:08,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:10:08,513 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2020-10-12 16:10:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 16:10:08,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:08,515 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:08,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:10:08,515 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:08,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:08,515 INFO L82 PathProgramCache]: Analyzing trace with hash 933163141, now seen corresponding path program 55 times [2020-10-12 16:10:08,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:08,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645177697] [2020-10-12 16:10:08,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:08,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:09,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:09,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 16:10:09,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:09,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 685 [2020-10-12 16:10:09,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:10:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:09,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-12 16:10:09,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:11,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:11,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:11,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:11,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:11,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:11,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:11,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:11,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:11,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:11,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:11,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:11,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645177697] [2020-10-12 16:10:11,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:11,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:10:11,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092296539] [2020-10-12 16:10:11,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:10:11,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:11,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:10:11,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:10:11,017 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand 58 states. [2020-10-12 16:10:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:11,249 INFO L93 Difference]: Finished difference Result 129 states and 129 transitions. [2020-10-12 16:10:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:10:11,250 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 120 [2020-10-12 16:10:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:11,251 INFO L225 Difference]: With dead ends: 129 [2020-10-12 16:10:11,251 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 16:10:11,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:10:11,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 16:10:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-12 16:10:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 16:10:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-10-12 16:10:11,256 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2020-10-12 16:10:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:11,256 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-10-12 16:10:11,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:10:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-10-12 16:10:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 16:10:11,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:11,257 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:11,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:10:11,258 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:11,258 INFO L82 PathProgramCache]: Analyzing trace with hash 256974659, now seen corresponding path program 56 times [2020-10-12 16:10:11,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:11,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998770347] [2020-10-12 16:10:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:11,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:11,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:11,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:11,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 16:10:11,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:11,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 500 [2020-10-12 16:10:11,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:11,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 16:10:11,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:11,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-12 16:10:11,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:13,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:13,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:13,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:13,625 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:13,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:13,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:13,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:13,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:13,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:13,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:13,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:13,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998770347] [2020-10-12 16:10:13,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:13,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 16:10:13,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169123138] [2020-10-12 16:10:13,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 16:10:13,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:13,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 16:10:13,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:10:13,639 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 59 states. [2020-10-12 16:10:13,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:13,835 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-10-12 16:10:13,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 16:10:13,836 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 122 [2020-10-12 16:10:13,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:13,837 INFO L225 Difference]: With dead ends: 131 [2020-10-12 16:10:13,837 INFO L226 Difference]: Without dead ends: 126 [2020-10-12 16:10:13,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:10:13,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-12 16:10:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2020-10-12 16:10:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 16:10:13,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2020-10-12 16:10:13,842 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2020-10-12 16:10:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:13,843 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2020-10-12 16:10:13,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 16:10:13,843 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2020-10-12 16:10:13,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 16:10:13,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:13,844 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:13,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:10:13,844 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:13,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1020094847, now seen corresponding path program 57 times [2020-10-12 16:10:13,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:13,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052738223] [2020-10-12 16:10:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:13,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:13,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:14,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:14,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 16:10:14,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 610 [2020-10-12 16:10:14,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 16:10:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:14,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-12 16:10:14,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:16,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:16,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:16,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:16,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:16,395 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:16,395 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:16,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:16,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:16,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:16,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052738223] [2020-10-12 16:10:16,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:16,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 16:10:16,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472051266] [2020-10-12 16:10:16,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 16:10:16,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 16:10:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:10:16,412 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand 60 states. [2020-10-12 16:10:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:16,670 INFO L93 Difference]: Finished difference Result 133 states and 133 transitions. [2020-10-12 16:10:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:10:16,671 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 124 [2020-10-12 16:10:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:16,671 INFO L225 Difference]: With dead ends: 133 [2020-10-12 16:10:16,672 INFO L226 Difference]: Without dead ends: 128 [2020-10-12 16:10:16,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:10:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-12 16:10:16,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2020-10-12 16:10:16,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 16:10:16,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-10-12 16:10:16,676 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2020-10-12 16:10:16,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:16,676 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-10-12 16:10:16,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 16:10:16,677 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-10-12 16:10:16,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:10:16,677 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:16,678 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:16,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:10:16,678 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:16,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:16,678 INFO L82 PathProgramCache]: Analyzing trace with hash 76756543, now seen corresponding path program 58 times [2020-10-12 16:10:16,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:16,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276476604] [2020-10-12 16:10:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:16,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:17,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:17,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 16:10:17,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:17,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 493 [2020-10-12 16:10:17,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:17,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 16:10:17,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:17,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-12 16:10:17,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:19,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:19,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:19,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:19,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:19,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:19,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:10:19,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:19,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:19,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:19,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276476604] [2020-10-12 16:10:19,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:19,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 16:10:19,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088836066] [2020-10-12 16:10:19,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 16:10:19,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:19,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 16:10:19,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:10:19,157 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 61 states. [2020-10-12 16:10:19,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:19,384 INFO L93 Difference]: Finished difference Result 135 states and 135 transitions. [2020-10-12 16:10:19,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:10:19,384 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 126 [2020-10-12 16:10:19,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:19,386 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:10:19,386 INFO L226 Difference]: Without dead ends: 130 [2020-10-12 16:10:19,387 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:10:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-12 16:10:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2020-10-12 16:10:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 16:10:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2020-10-12 16:10:19,393 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2020-10-12 16:10:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:19,394 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2020-10-12 16:10:19,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 16:10:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2020-10-12 16:10:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 16:10:19,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:19,398 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:19,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:10:19,398 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:19,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:19,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1883954813, now seen corresponding path program 59 times [2020-10-12 16:10:19,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:19,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340127063] [2020-10-12 16:10:19,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:19,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:20,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 632 [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 120 [2020-10-12 16:10:20,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:22,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:22,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:22,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:22,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:22,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:22,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:22,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:22,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:22,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:22,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:22,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:22,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:22,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340127063] [2020-10-12 16:10:22,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:22,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 16:10:22,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690861464] [2020-10-12 16:10:22,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 16:10:22,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:22,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 16:10:22,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:10:22,111 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand 62 states. [2020-10-12 16:10:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:22,359 INFO L93 Difference]: Finished difference Result 137 states and 137 transitions. [2020-10-12 16:10:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 16:10:22,360 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 128 [2020-10-12 16:10:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:22,360 INFO L225 Difference]: With dead ends: 137 [2020-10-12 16:10:22,361 INFO L226 Difference]: Without dead ends: 132 [2020-10-12 16:10:22,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:10:22,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-12 16:10:22,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2020-10-12 16:10:22,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 16:10:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-10-12 16:10:22,365 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2020-10-12 16:10:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:22,365 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-10-12 16:10:22,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 16:10:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-10-12 16:10:22,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 16:10:22,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:22,366 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:22,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:10:22,367 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:22,367 INFO L82 PathProgramCache]: Analyzing trace with hash -860262597, now seen corresponding path program 60 times [2020-10-12 16:10:22,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:22,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220811200] [2020-10-12 16:10:22,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:22,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:22,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:22,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:22,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 16:10:22,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:22,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 560 [2020-10-12 16:10:22,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:22,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 16:10:22,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:22,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-12 16:10:22,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:25,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:25,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:25,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:25,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:25,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:25,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:25,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:25,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:25,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:25,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:25,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220811200] [2020-10-12 16:10:25,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:25,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 16:10:25,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210680803] [2020-10-12 16:10:25,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 16:10:25,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 16:10:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:10:25,078 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 63 states. [2020-10-12 16:10:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:25,330 INFO L93 Difference]: Finished difference Result 139 states and 139 transitions. [2020-10-12 16:10:25,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:10:25,331 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 130 [2020-10-12 16:10:25,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:25,332 INFO L225 Difference]: With dead ends: 139 [2020-10-12 16:10:25,332 INFO L226 Difference]: Without dead ends: 134 [2020-10-12 16:10:25,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:10:25,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-12 16:10:25,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2020-10-12 16:10:25,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 16:10:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2020-10-12 16:10:25,335 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2020-10-12 16:10:25,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:25,336 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2020-10-12 16:10:25,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 16:10:25,336 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2020-10-12 16:10:25,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 16:10:25,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:25,336 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:25,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:10:25,337 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:25,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:25,337 INFO L82 PathProgramCache]: Analyzing trace with hash -943273863, now seen corresponding path program 61 times [2020-10-12 16:10:25,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:25,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102310474] [2020-10-12 16:10:25,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:25,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:25,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:25,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 16:10:25,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:25,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 604 [2020-10-12 16:10:25,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 16:10:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:25,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 124 [2020-10-12 16:10:25,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:28,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:28,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:28,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:28,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:28,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:28,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:28,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:28,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:28,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:28,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:28,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:28,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:28,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102310474] [2020-10-12 16:10:28,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:28,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 16:10:28,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309306837] [2020-10-12 16:10:28,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 16:10:28,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:28,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 16:10:28,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:10:28,152 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand 64 states. [2020-10-12 16:10:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:28,378 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-10-12 16:10:28,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 16:10:28,379 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 132 [2020-10-12 16:10:28,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:28,380 INFO L225 Difference]: With dead ends: 141 [2020-10-12 16:10:28,380 INFO L226 Difference]: Without dead ends: 136 [2020-10-12 16:10:28,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:10:28,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-12 16:10:28,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2020-10-12 16:10:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 16:10:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2020-10-12 16:10:28,383 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2020-10-12 16:10:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:28,383 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2020-10-12 16:10:28,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 16:10:28,384 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2020-10-12 16:10:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 16:10:28,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:28,384 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:28,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:10:28,385 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash 887278135, now seen corresponding path program 62 times [2020-10-12 16:10:28,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:28,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148195926] [2020-10-12 16:10:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:28,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:28,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:28,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 16:10:28,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:28,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-12 16:10:28,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:28,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 16:10:28,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:28,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-12 16:10:28,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:31,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:31,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:31,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:31,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:31,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:31,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:31,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:31,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:31,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:31,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148195926] [2020-10-12 16:10:31,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:31,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 16:10:31,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747500397] [2020-10-12 16:10:31,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 16:10:31,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:31,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 16:10:31,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:10:31,281 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand 65 states. [2020-10-12 16:10:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:31,538 INFO L93 Difference]: Finished difference Result 143 states and 143 transitions. [2020-10-12 16:10:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 16:10:31,538 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 134 [2020-10-12 16:10:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:31,539 INFO L225 Difference]: With dead ends: 143 [2020-10-12 16:10:31,539 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 16:10:31,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:10:31,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 16:10:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2020-10-12 16:10:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 16:10:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-10-12 16:10:31,543 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2020-10-12 16:10:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:31,543 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-10-12 16:10:31,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 16:10:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-10-12 16:10:31,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 16:10:31,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:31,544 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:31,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:10:31,545 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:31,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:31,545 INFO L82 PathProgramCache]: Analyzing trace with hash -888843147, now seen corresponding path program 63 times [2020-10-12 16:10:31,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:31,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477883694] [2020-10-12 16:10:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:31,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:31,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:32,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:32,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 16:10:32,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:32,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-12 16:10:32,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:32,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 16:10:32,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:32,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-12 16:10:32,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:34,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:34,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:34,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:34,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:34,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:34,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:34,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:34,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:34,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:34,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:34,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:10:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:34,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477883694] [2020-10-12 16:10:34,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:34,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 16:10:34,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008034276] [2020-10-12 16:10:34,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 16:10:34,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 16:10:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:10:34,531 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 66 states. [2020-10-12 16:10:34,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:34,798 INFO L93 Difference]: Finished difference Result 145 states and 145 transitions. [2020-10-12 16:10:34,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 16:10:34,799 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 136 [2020-10-12 16:10:34,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:34,800 INFO L225 Difference]: With dead ends: 145 [2020-10-12 16:10:34,800 INFO L226 Difference]: Without dead ends: 140 [2020-10-12 16:10:34,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:10:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-12 16:10:34,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2020-10-12 16:10:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 16:10:34,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-10-12 16:10:34,804 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2020-10-12 16:10:34,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:34,804 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-10-12 16:10:34,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 16:10:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-10-12 16:10:34,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 16:10:34,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:34,805 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:34,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:10:34,806 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:34,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1655588659, now seen corresponding path program 64 times [2020-10-12 16:10:34,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:34,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490736957] [2020-10-12 16:10:34,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:34,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:34,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:35,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:35,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 16:10:35,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:35,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-12 16:10:35,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 16:10:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:35,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-12 16:10:35,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:37,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:37,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:37,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:37,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:37,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:37,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:37,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:37,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:37,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:37,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490736957] [2020-10-12 16:10:37,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:37,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 16:10:37,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933082620] [2020-10-12 16:10:37,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 16:10:37,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 16:10:37,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:10:37,929 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 67 states. [2020-10-12 16:10:38,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:38,209 INFO L93 Difference]: Finished difference Result 147 states and 147 transitions. [2020-10-12 16:10:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-12 16:10:38,210 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 138 [2020-10-12 16:10:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:38,210 INFO L225 Difference]: With dead ends: 147 [2020-10-12 16:10:38,210 INFO L226 Difference]: Without dead ends: 142 [2020-10-12 16:10:38,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:10:38,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-12 16:10:38,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2020-10-12 16:10:38,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 16:10:38,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2020-10-12 16:10:38,215 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2020-10-12 16:10:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:38,215 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2020-10-12 16:10:38,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 16:10:38,215 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2020-10-12 16:10:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 16:10:38,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:38,216 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:38,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:10:38,217 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:38,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1276804495, now seen corresponding path program 65 times [2020-10-12 16:10:38,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:38,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355783610] [2020-10-12 16:10:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:38,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:38,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:38,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:38,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 16:10:38,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:38,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 670 [2020-10-12 16:10:38,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-12 16:10:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 132 [2020-10-12 16:10:38,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:41,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:41,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:41,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:41,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:41,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:41,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:41,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:41,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:41,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:41,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355783610] [2020-10-12 16:10:41,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:41,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 16:10:41,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014146436] [2020-10-12 16:10:41,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 16:10:41,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 16:10:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:10:41,448 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand 68 states. [2020-10-12 16:10:41,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:41,725 INFO L93 Difference]: Finished difference Result 149 states and 149 transitions. [2020-10-12 16:10:41,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-12 16:10:41,726 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 140 [2020-10-12 16:10:41,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:41,727 INFO L225 Difference]: With dead ends: 149 [2020-10-12 16:10:41,727 INFO L226 Difference]: Without dead ends: 144 [2020-10-12 16:10:41,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:10:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-12 16:10:41,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2020-10-12 16:10:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 16:10:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2020-10-12 16:10:41,730 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2020-10-12 16:10:41,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:41,730 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2020-10-12 16:10:41,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 16:10:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2020-10-12 16:10:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 16:10:41,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:41,732 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:41,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:10:41,732 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:41,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:41,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1808079313, now seen corresponding path program 66 times [2020-10-12 16:10:41,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:41,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1447637117] [2020-10-12 16:10:41,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:41,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:42,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:42,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 16:10:42,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:42,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 671 [2020-10-12 16:10:42,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 16:10:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-12 16:10:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:45,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:45,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:45,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:45,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:45,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:45,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:45,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:45,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1447637117] [2020-10-12 16:10:45,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:45,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-12 16:10:45,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190815539] [2020-10-12 16:10:45,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-12 16:10:45,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:45,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-12 16:10:45,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:10:45,037 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand 69 states. [2020-10-12 16:10:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:45,322 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-10-12 16:10:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-12 16:10:45,322 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 142 [2020-10-12 16:10:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:45,323 INFO L225 Difference]: With dead ends: 151 [2020-10-12 16:10:45,323 INFO L226 Difference]: Without dead ends: 146 [2020-10-12 16:10:45,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:10:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-12 16:10:45,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2020-10-12 16:10:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 16:10:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2020-10-12 16:10:45,328 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2020-10-12 16:10:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:45,328 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2020-10-12 16:10:45,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-12 16:10:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2020-10-12 16:10:45,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 16:10:45,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:45,329 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:45,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:10:45,329 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:45,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:45,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1262071187, now seen corresponding path program 67 times [2020-10-12 16:10:45,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:45,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404080152] [2020-10-12 16:10:45,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:45,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:45,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:46,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:46,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-12 16:10:46,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-10-12 16:10:46,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-12 16:10:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:46,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-12 16:10:46,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:48,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:48,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:48,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:48,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:48,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:48,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:48,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:48,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:48,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:48,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:48,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404080152] [2020-10-12 16:10:48,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:48,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 16:10:48,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447359585] [2020-10-12 16:10:48,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 16:10:48,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:48,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 16:10:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:10:48,765 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand 70 states. [2020-10-12 16:10:49,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:49,066 INFO L93 Difference]: Finished difference Result 153 states and 153 transitions. [2020-10-12 16:10:49,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 16:10:49,072 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 144 [2020-10-12 16:10:49,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:49,073 INFO L225 Difference]: With dead ends: 153 [2020-10-12 16:10:49,073 INFO L226 Difference]: Without dead ends: 148 [2020-10-12 16:10:49,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:10:49,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-12 16:10:49,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2020-10-12 16:10:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 16:10:49,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-10-12 16:10:49,077 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2020-10-12 16:10:49,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:49,077 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-10-12 16:10:49,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-12 16:10:49,077 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-10-12 16:10:49,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 16:10:49,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:49,078 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:49,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:10:49,078 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:49,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:49,079 INFO L82 PathProgramCache]: Analyzing trace with hash -534272213, now seen corresponding path program 68 times [2020-10-12 16:10:49,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:49,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679856560] [2020-10-12 16:10:49,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:49,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:50,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:50,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 16:10:50,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:50,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-12 16:10:50,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 16:10:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:50,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-12 16:10:50,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:52,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:52,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:52,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:52,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:52,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:52,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:52,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:52,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:52,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679856560] [2020-10-12 16:10:52,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:52,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-12 16:10:52,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900530791] [2020-10-12 16:10:52,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-12 16:10:52,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-12 16:10:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:10:52,942 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 71 states. [2020-10-12 16:10:53,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:53,222 INFO L93 Difference]: Finished difference Result 155 states and 155 transitions. [2020-10-12 16:10:53,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 16:10:53,222 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 146 [2020-10-12 16:10:53,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:53,223 INFO L225 Difference]: With dead ends: 155 [2020-10-12 16:10:53,223 INFO L226 Difference]: Without dead ends: 150 [2020-10-12 16:10:53,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:10:53,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-12 16:10:53,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2020-10-12 16:10:53,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 16:10:53,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2020-10-12 16:10:53,228 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2020-10-12 16:10:53,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:53,228 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2020-10-12 16:10:53,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-12 16:10:53,228 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2020-10-12 16:10:53,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 16:10:53,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:53,229 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:53,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:10:53,230 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:53,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:53,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1199127447, now seen corresponding path program 69 times [2020-10-12 16:10:53,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:53,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544321690] [2020-10-12 16:10:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:53,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:53,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:53,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-12 16:10:53,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:53,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 734 [2020-10-12 16:10:53,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:53,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-12 16:10:53,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:53,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 140 [2020-10-12 16:10:53,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:56,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:10:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:56,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:56,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:56,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:10:56,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:56,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:10:56,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:56,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:10:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:10:56,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:10:56,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:10:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:10:56,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544321690] [2020-10-12 16:10:56,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:10:56,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-12 16:10:56,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730035701] [2020-10-12 16:10:56,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-12 16:10:56,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:10:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-12 16:10:56,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:10:56,814 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand 72 states. [2020-10-12 16:10:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:10:57,086 INFO L93 Difference]: Finished difference Result 157 states and 157 transitions. [2020-10-12 16:10:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 16:10:57,086 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 148 [2020-10-12 16:10:57,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:10:57,087 INFO L225 Difference]: With dead ends: 157 [2020-10-12 16:10:57,087 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 16:10:57,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:10:57,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 16:10:57,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2020-10-12 16:10:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 16:10:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2020-10-12 16:10:57,091 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2020-10-12 16:10:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:10:57,092 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2020-10-12 16:10:57,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-12 16:10:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2020-10-12 16:10:57,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 16:10:57,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:10:57,093 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:10:57,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:10:57,093 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:10:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:10:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash -174880217, now seen corresponding path program 70 times [2020-10-12 16:10:57,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:10:57,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508041418] [2020-10-12 16:10:57,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:10:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:10:57,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:10:57,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:10:57,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 16:10:57,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:10:57,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 835 [2020-10-12 16:10:57,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:10:57,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-12 16:10:57,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:10:57,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-12 16:10:57,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:00,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:00,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:00,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:00,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:00,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:00,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:00,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:00,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:00,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:00,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:00,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:00,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508041418] [2020-10-12 16:11:00,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:00,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-12 16:11:00,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041174110] [2020-10-12 16:11:00,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-12 16:11:00,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:00,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-12 16:11:00,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:11:00,920 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand 73 states. [2020-10-12 16:11:01,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:01,250 INFO L93 Difference]: Finished difference Result 159 states and 159 transitions. [2020-10-12 16:11:01,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-12 16:11:01,251 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 150 [2020-10-12 16:11:01,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:01,252 INFO L225 Difference]: With dead ends: 159 [2020-10-12 16:11:01,253 INFO L226 Difference]: Without dead ends: 154 [2020-10-12 16:11:01,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:11:01,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-12 16:11:01,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2020-10-12 16:11:01,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 16:11:01,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2020-10-12 16:11:01,259 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2020-10-12 16:11:01,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:01,260 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2020-10-12 16:11:01,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-12 16:11:01,260 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2020-10-12 16:11:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 16:11:01,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:01,262 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:01,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:11:01,262 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:01,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:01,263 INFO L82 PathProgramCache]: Analyzing trace with hash 579197029, now seen corresponding path program 71 times [2020-10-12 16:11:01,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:01,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352095348] [2020-10-12 16:11:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:01,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:02,848 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:02,848 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 16:11:02,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:02,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-10-12 16:11:02,849 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:02,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 16:11:02,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:02,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-12 16:11:02,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:05,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:05,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:05,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:05,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:05,849 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:05,849 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:05,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:05,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:05,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:05,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:05,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:05,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352095348] [2020-10-12 16:11:05,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:05,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-12 16:11:05,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369321703] [2020-10-12 16:11:05,867 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-12 16:11:05,867 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:05,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-12 16:11:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:11:05,868 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand 74 states. [2020-10-12 16:11:06,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:06,147 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-10-12 16:11:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 16:11:06,147 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 152 [2020-10-12 16:11:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:06,149 INFO L225 Difference]: With dead ends: 161 [2020-10-12 16:11:06,149 INFO L226 Difference]: Without dead ends: 156 [2020-10-12 16:11:06,149 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:11:06,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-12 16:11:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2020-10-12 16:11:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 16:11:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-10-12 16:11:06,152 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2020-10-12 16:11:06,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:06,152 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-10-12 16:11:06,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-12 16:11:06,153 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-10-12 16:11:06,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-12 16:11:06,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:06,153 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:06,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:11:06,153 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:06,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:06,154 INFO L82 PathProgramCache]: Analyzing trace with hash -602042589, now seen corresponding path program 72 times [2020-10-12 16:11:06,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:06,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244062762] [2020-10-12 16:11:06,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:06,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:06,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:06,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-12 16:11:06,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:06,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 804 [2020-10-12 16:11:06,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:06,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-12 16:11:06,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:06,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-12 16:11:06,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:10,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:10,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:10,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:10,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:10,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:10,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:10,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:10,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:10,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:10,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:10,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:10,145 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:10,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244062762] [2020-10-12 16:11:10,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:10,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 16:11:10,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894074312] [2020-10-12 16:11:10,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 16:11:10,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:10,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 16:11:10,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:11:10,147 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 75 states. [2020-10-12 16:11:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:10,471 INFO L93 Difference]: Finished difference Result 163 states and 163 transitions. [2020-10-12 16:11:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-12 16:11:10,471 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 154 [2020-10-12 16:11:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:10,472 INFO L225 Difference]: With dead ends: 163 [2020-10-12 16:11:10,472 INFO L226 Difference]: Without dead ends: 158 [2020-10-12 16:11:10,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:11:10,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-12 16:11:10,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2020-10-12 16:11:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 16:11:10,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-10-12 16:11:10,476 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2020-10-12 16:11:10,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:10,477 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-10-12 16:11:10,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 16:11:10,477 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-10-12 16:11:10,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 16:11:10,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:10,478 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:10,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 16:11:10,478 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:10,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1901949343, now seen corresponding path program 73 times [2020-10-12 16:11:10,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:10,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137303431] [2020-10-12 16:11:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:10,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:11,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:11,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-12 16:11:11,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:11,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 813 [2020-10-12 16:11:11,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:11,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-12 16:11:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:11,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 148 [2020-10-12 16:11:11,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:14,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:14,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:14,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:14,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:14,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:14,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:14,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:14,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:14,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:14,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137303431] [2020-10-12 16:11:14,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:14,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-12 16:11:14,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681389189] [2020-10-12 16:11:14,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-12 16:11:14,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-12 16:11:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:11:14,565 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 76 states. [2020-10-12 16:11:14,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:14,878 INFO L93 Difference]: Finished difference Result 165 states and 165 transitions. [2020-10-12 16:11:14,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-12 16:11:14,879 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 156 [2020-10-12 16:11:14,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:14,880 INFO L225 Difference]: With dead ends: 165 [2020-10-12 16:11:14,880 INFO L226 Difference]: Without dead ends: 160 [2020-10-12 16:11:14,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:11:14,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-12 16:11:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2020-10-12 16:11:14,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 16:11:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2020-10-12 16:11:14,884 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2020-10-12 16:11:14,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:14,885 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2020-10-12 16:11:14,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-12 16:11:14,885 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2020-10-12 16:11:14,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-12 16:11:14,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:14,886 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:14,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 16:11:14,886 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:14,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1276856801, now seen corresponding path program 74 times [2020-10-12 16:11:14,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:14,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981426690] [2020-10-12 16:11:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:14,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:15,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:15,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 16:11:15,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:15,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 846 [2020-10-12 16:11:15,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:15,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-12 16:11:15,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:15,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-12 16:11:15,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:19,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:19,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:19,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:19,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:19,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:19,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:19,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:19,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:19,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:19,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:19,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:19,049 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:19,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981426690] [2020-10-12 16:11:19,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:19,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-12 16:11:19,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711876449] [2020-10-12 16:11:19,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-12 16:11:19,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:19,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-12 16:11:19,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:11:19,051 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand 77 states. [2020-10-12 16:11:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:19,361 INFO L93 Difference]: Finished difference Result 167 states and 167 transitions. [2020-10-12 16:11:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-12 16:11:19,361 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 158 [2020-10-12 16:11:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:19,362 INFO L225 Difference]: With dead ends: 167 [2020-10-12 16:11:19,362 INFO L226 Difference]: Without dead ends: 162 [2020-10-12 16:11:19,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:11:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-12 16:11:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2020-10-12 16:11:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 16:11:19,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2020-10-12 16:11:19,367 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2020-10-12 16:11:19,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:19,367 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2020-10-12 16:11:19,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-12 16:11:19,367 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2020-10-12 16:11:19,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-12 16:11:19,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:19,368 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:19,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 16:11:19,369 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:19,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:19,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1858345379, now seen corresponding path program 75 times [2020-10-12 16:11:19,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:19,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1127731487] [2020-10-12 16:11:19,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:19,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:20,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:20,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-12 16:11:20,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:20,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 914 [2020-10-12 16:11:20,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:20,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-12 16:11:20,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:20,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 152 [2020-10-12 16:11:20,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:23,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:23,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:23,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:23,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:23,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:23,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:23,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:23,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:23,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:23,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:23,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1127731487] [2020-10-12 16:11:23,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:23,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-12 16:11:23,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978181671] [2020-10-12 16:11:23,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-12 16:11:23,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:23,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-12 16:11:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:11:23,801 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand 78 states. [2020-10-12 16:11:24,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:24,146 INFO L93 Difference]: Finished difference Result 169 states and 169 transitions. [2020-10-12 16:11:24,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-12 16:11:24,146 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 160 [2020-10-12 16:11:24,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:24,147 INFO L225 Difference]: With dead ends: 169 [2020-10-12 16:11:24,147 INFO L226 Difference]: Without dead ends: 164 [2020-10-12 16:11:24,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:11:24,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-12 16:11:24,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2020-10-12 16:11:24,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 16:11:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-10-12 16:11:24,151 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2020-10-12 16:11:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:24,152 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-10-12 16:11:24,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-12 16:11:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-10-12 16:11:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-12 16:11:24,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:24,153 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:24,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-12 16:11:24,153 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:24,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:24,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1971846939, now seen corresponding path program 76 times [2020-10-12 16:11:24,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:24,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384309684] [2020-10-12 16:11:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:24,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:25,460 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:25,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-12 16:11:25,461 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:25,461 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1289 [2020-10-12 16:11:25,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-12 16:11:25,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:25,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-12 16:11:25,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:28,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:28,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:28,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:28,908 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:28,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:28,909 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:28,909 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:11:28,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:28,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:28,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:28,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:28,910 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:28,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384309684] [2020-10-12 16:11:28,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:28,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-12 16:11:28,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500059160] [2020-10-12 16:11:28,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-12 16:11:28,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:28,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-12 16:11:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:11:28,931 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 79 states. [2020-10-12 16:11:29,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:29,235 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-10-12 16:11:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-12 16:11:29,236 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 162 [2020-10-12 16:11:29,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:29,236 INFO L225 Difference]: With dead ends: 171 [2020-10-12 16:11:29,237 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 16:11:29,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:11:29,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 16:11:29,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2020-10-12 16:11:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 16:11:29,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2020-10-12 16:11:29,240 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2020-10-12 16:11:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:29,241 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2020-10-12 16:11:29,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-12 16:11:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2020-10-12 16:11:29,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-12 16:11:29,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:29,242 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:29,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-12 16:11:29,243 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:29,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:29,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1999691865, now seen corresponding path program 77 times [2020-10-12 16:11:29,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:29,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854302987] [2020-10-12 16:11:29,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:29,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:29,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:30,451 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:30,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-12 16:11:30,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:30,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1190 [2020-10-12 16:11:30,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:30,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-12 16:11:30,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:30,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 156 [2020-10-12 16:11:30,452 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:34,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:34,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:34,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:34,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:34,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:34,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:34,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:34,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:34,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:34,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:34,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:34,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854302987] [2020-10-12 16:11:34,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:34,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-12 16:11:34,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590846535] [2020-10-12 16:11:34,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-12 16:11:34,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:34,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-12 16:11:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:11:34,190 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand 80 states. [2020-10-12 16:11:34,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:34,485 INFO L93 Difference]: Finished difference Result 173 states and 173 transitions. [2020-10-12 16:11:34,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-12 16:11:34,486 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 164 [2020-10-12 16:11:34,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:34,487 INFO L225 Difference]: With dead ends: 173 [2020-10-12 16:11:34,488 INFO L226 Difference]: Without dead ends: 168 [2020-10-12 16:11:34,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:11:34,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-12 16:11:34,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2020-10-12 16:11:34,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-12 16:11:34,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-10-12 16:11:34,492 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2020-10-12 16:11:34,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:34,492 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-10-12 16:11:34,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-12 16:11:34,492 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-10-12 16:11:34,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 16:11:34,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:34,494 INFO L422 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:34,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-12 16:11:34,494 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:34,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:34,494 INFO L82 PathProgramCache]: Analyzing trace with hash -1306105321, now seen corresponding path program 78 times [2020-10-12 16:11:34,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:34,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1760073966] [2020-10-12 16:11:34,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:34,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:35,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:35,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 16:11:35,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:35,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-12 16:11:35,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:35,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-12 16:11:35,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:35,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-12 16:11:35,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:39,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:39,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:39,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:39,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:39,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:39,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:39,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:39,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:39,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1760073966] [2020-10-12 16:11:39,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:39,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-12 16:11:39,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895680882] [2020-10-12 16:11:39,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-12 16:11:39,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:39,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-12 16:11:39,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:11:39,352 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 81 states. [2020-10-12 16:11:39,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:39,765 INFO L93 Difference]: Finished difference Result 175 states and 175 transitions. [2020-10-12 16:11:39,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-12 16:11:39,766 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 166 [2020-10-12 16:11:39,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:39,767 INFO L225 Difference]: With dead ends: 175 [2020-10-12 16:11:39,767 INFO L226 Difference]: Without dead ends: 170 [2020-10-12 16:11:39,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:11:39,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-12 16:11:39,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2020-10-12 16:11:39,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 16:11:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2020-10-12 16:11:39,772 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2020-10-12 16:11:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:39,773 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2020-10-12 16:11:39,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-12 16:11:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2020-10-12 16:11:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-12 16:11:39,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:39,774 INFO L422 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:39,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-12 16:11:39,774 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:39,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:39,775 INFO L82 PathProgramCache]: Analyzing trace with hash 98597973, now seen corresponding path program 79 times [2020-10-12 16:11:39,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:39,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093519109] [2020-10-12 16:11:39,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:39,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:40,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:40,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-12 16:11:40,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:40,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1067 [2020-10-12 16:11:40,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:40,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-12 16:11:40,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:40,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-10-12 16:11:40,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:44,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:44,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:44,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:44,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:44,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:44,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:44,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:44,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:44,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:44,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:44,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093519109] [2020-10-12 16:11:44,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:44,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-12 16:11:44,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550783602] [2020-10-12 16:11:44,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-12 16:11:44,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-12 16:11:44,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:11:44,903 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand 82 states. [2020-10-12 16:11:45,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:45,259 INFO L93 Difference]: Finished difference Result 177 states and 177 transitions. [2020-10-12 16:11:45,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-12 16:11:45,260 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 168 [2020-10-12 16:11:45,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:45,261 INFO L225 Difference]: With dead ends: 177 [2020-10-12 16:11:45,261 INFO L226 Difference]: Without dead ends: 172 [2020-10-12 16:11:45,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:11:45,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-12 16:11:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2020-10-12 16:11:45,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 16:11:45,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-10-12 16:11:45,266 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2020-10-12 16:11:45,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:45,267 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-10-12 16:11:45,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-12 16:11:45,267 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-10-12 16:11:45,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-12 16:11:45,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:45,268 INFO L422 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:45,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-12 16:11:45,268 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:45,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1398732563, now seen corresponding path program 80 times [2020-10-12 16:11:45,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:45,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138931104] [2020-10-12 16:11:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:45,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:46,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:46,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-12 16:11:46,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:46,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1083 [2020-10-12 16:11:46,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-12 16:11:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:46,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-12 16:11:46,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:50,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:50,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:50,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:50,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:50,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:50,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:50,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:50,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:50,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:50,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:50,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:50,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:50,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138931104] [2020-10-12 16:11:50,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:50,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-12 16:11:50,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912967250] [2020-10-12 16:11:50,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-12 16:11:50,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-12 16:11:50,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:11:50,495 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 83 states. [2020-10-12 16:11:50,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:50,842 INFO L93 Difference]: Finished difference Result 179 states and 179 transitions. [2020-10-12 16:11:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-12 16:11:50,843 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 170 [2020-10-12 16:11:50,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:50,844 INFO L225 Difference]: With dead ends: 179 [2020-10-12 16:11:50,844 INFO L226 Difference]: Without dead ends: 174 [2020-10-12 16:11:50,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:11:50,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-12 16:11:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2020-10-12 16:11:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-12 16:11:50,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2020-10-12 16:11:50,849 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2020-10-12 16:11:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:50,849 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2020-10-12 16:11:50,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-12 16:11:50,849 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2020-10-12 16:11:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-12 16:11:50,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:50,850 INFO L422 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:50,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-12 16:11:50,851 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:50,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:50,851 INFO L82 PathProgramCache]: Analyzing trace with hash 992590417, now seen corresponding path program 81 times [2020-10-12 16:11:50,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:50,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615071732] [2020-10-12 16:11:50,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:50,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:51,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:51,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-12 16:11:51,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:51,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1103 [2020-10-12 16:11:51,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-12 16:11:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:51,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 164 [2020-10-12 16:11:51,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:56,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:11:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:56,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:56,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:56,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:11:56,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:56,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:11:56,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:11:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:11:56,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:11:56,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:11:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:11:56,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615071732] [2020-10-12 16:11:56,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:11:56,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-12 16:11:56,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034792478] [2020-10-12 16:11:56,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-12 16:11:56,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:11:56,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-12 16:11:56,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 16:11:56,195 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand 84 states. [2020-10-12 16:11:56,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:11:56,593 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-10-12 16:11:56,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-12 16:11:56,593 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 172 [2020-10-12 16:11:56,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:11:56,594 INFO L225 Difference]: With dead ends: 181 [2020-10-12 16:11:56,594 INFO L226 Difference]: Without dead ends: 176 [2020-10-12 16:11:56,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 16:11:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-12 16:11:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2020-10-12 16:11:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 16:11:56,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2020-10-12 16:11:56,598 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2020-10-12 16:11:56,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:11:56,598 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2020-10-12 16:11:56,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-12 16:11:56,598 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2020-10-12 16:11:56,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-12 16:11:56,601 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:11:56,601 INFO L422 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:11:56,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-12 16:11:56,601 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:11:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:11:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1532012047, now seen corresponding path program 82 times [2020-10-12 16:11:56,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:11:56,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679482686] [2020-10-12 16:11:56,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:11:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:11:56,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:11:57,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:11:57,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 16:11:57,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:11:57,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1059 [2020-10-12 16:11:57,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:11:57,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-12 16:11:57,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:11:57,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-12 16:11:57,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:01,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:01,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:01,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:01,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:01,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:01,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:01,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:01,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:01,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:01,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679482686] [2020-10-12 16:12:01,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:01,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-12 16:12:01,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440791501] [2020-10-12 16:12:01,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-12 16:12:01,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:01,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-12 16:12:01,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 16:12:01,895 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand 85 states. [2020-10-12 16:12:02,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:02,304 INFO L93 Difference]: Finished difference Result 183 states and 183 transitions. [2020-10-12 16:12:02,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-12 16:12:02,305 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 174 [2020-10-12 16:12:02,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:02,306 INFO L225 Difference]: With dead ends: 183 [2020-10-12 16:12:02,306 INFO L226 Difference]: Without dead ends: 178 [2020-10-12 16:12:02,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 16:12:02,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-12 16:12:02,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-12 16:12:02,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 16:12:02,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-10-12 16:12:02,310 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2020-10-12 16:12:02,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:02,310 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-10-12 16:12:02,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-12 16:12:02,310 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-10-12 16:12:02,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 16:12:02,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:02,311 INFO L422 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:02,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-12 16:12:02,311 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash 225155661, now seen corresponding path program 83 times [2020-10-12 16:12:02,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:02,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105008986] [2020-10-12 16:12:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:02,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:03,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:03,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-12 16:12:03,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:03,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1101 [2020-10-12 16:12:03,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-12 16:12:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:03,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-12 16:12:03,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:07,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:07,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:07,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:07,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:07,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:07,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:07,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:07,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:07,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:07,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:07,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:07,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:07,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105008986] [2020-10-12 16:12:07,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:07,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-12 16:12:07,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517353393] [2020-10-12 16:12:07,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-12 16:12:07,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:07,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-12 16:12:07,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 16:12:07,778 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 86 states. [2020-10-12 16:12:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:08,172 INFO L93 Difference]: Finished difference Result 185 states and 185 transitions. [2020-10-12 16:12:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-12 16:12:08,172 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 176 [2020-10-12 16:12:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:08,173 INFO L225 Difference]: With dead ends: 185 [2020-10-12 16:12:08,173 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 16:12:08,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 16:12:08,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 16:12:08,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2020-10-12 16:12:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 16:12:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-10-12 16:12:08,176 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2020-10-12 16:12:08,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:08,176 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-10-12 16:12:08,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-12 16:12:08,176 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-10-12 16:12:08,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-12 16:12:08,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:08,177 INFO L422 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:08,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-12 16:12:08,178 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:08,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:08,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1533380853, now seen corresponding path program 84 times [2020-10-12 16:12:08,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:08,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623435919] [2020-10-12 16:12:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:08,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:09,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:09,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-12 16:12:09,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:09,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1100 [2020-10-12 16:12:09,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-12 16:12:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:09,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-12 16:12:09,295 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:13,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:13,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:13,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:13,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:13,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:13,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:13,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:13,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:13,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:13,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:13,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623435919] [2020-10-12 16:12:13,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:13,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-10-12 16:12:13,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789820047] [2020-10-12 16:12:13,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-12 16:12:13,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:13,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-12 16:12:13,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:12:13,791 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 87 states. [2020-10-12 16:12:14,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:14,204 INFO L93 Difference]: Finished difference Result 187 states and 187 transitions. [2020-10-12 16:12:14,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-12 16:12:14,204 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 178 [2020-10-12 16:12:14,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:14,205 INFO L225 Difference]: With dead ends: 187 [2020-10-12 16:12:14,205 INFO L226 Difference]: Without dead ends: 182 [2020-10-12 16:12:14,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:12:14,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-12 16:12:14,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2020-10-12 16:12:14,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 16:12:14,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2020-10-12 16:12:14,209 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2020-10-12 16:12:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:14,210 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2020-10-12 16:12:14,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-12 16:12:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2020-10-12 16:12:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-12 16:12:14,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:14,211 INFO L422 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:14,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-12 16:12:14,211 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:14,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:14,212 INFO L82 PathProgramCache]: Analyzing trace with hash 730143817, now seen corresponding path program 85 times [2020-10-12 16:12:14,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:14,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305317097] [2020-10-12 16:12:14,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:14,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:15,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:15,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-12 16:12:15,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:15,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1143 [2020-10-12 16:12:15,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-12 16:12:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:15,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 172 [2020-10-12 16:12:15,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:20,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:20,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:20,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:20,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:20,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:20,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:20,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:20,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:20,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:20,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305317097] [2020-10-12 16:12:20,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:20,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-12 16:12:20,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46011625] [2020-10-12 16:12:20,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-12 16:12:20,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:20,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-12 16:12:20,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 16:12:20,124 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand 88 states. [2020-10-12 16:12:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:20,565 INFO L93 Difference]: Finished difference Result 189 states and 189 transitions. [2020-10-12 16:12:20,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-12 16:12:20,565 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 180 [2020-10-12 16:12:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:20,566 INFO L225 Difference]: With dead ends: 189 [2020-10-12 16:12:20,566 INFO L226 Difference]: Without dead ends: 184 [2020-10-12 16:12:20,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 16:12:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-12 16:12:20,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2020-10-12 16:12:20,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 16:12:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2020-10-12 16:12:20,570 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2020-10-12 16:12:20,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:20,571 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2020-10-12 16:12:20,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-12 16:12:20,571 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2020-10-12 16:12:20,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-12 16:12:20,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:20,572 INFO L422 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:20,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-12 16:12:20,573 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1571067385, now seen corresponding path program 86 times [2020-10-12 16:12:20,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:20,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [675520637] [2020-10-12 16:12:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:20,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:21,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:21,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 16:12:21,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:21,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1279 [2020-10-12 16:12:21,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:21,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-12 16:12:21,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:21,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-12 16:12:21,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:26,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:26,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:26,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:26,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:26,738 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:26,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:26,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:26,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:26,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:26,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:26,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [675520637] [2020-10-12 16:12:26,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:26,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-12 16:12:26,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902069637] [2020-10-12 16:12:26,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-12 16:12:26,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:26,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-12 16:12:26,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 16:12:26,765 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand 89 states. [2020-10-12 16:12:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:27,243 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-10-12 16:12:27,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-12 16:12:27,243 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 182 [2020-10-12 16:12:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:27,244 INFO L225 Difference]: With dead ends: 191 [2020-10-12 16:12:27,244 INFO L226 Difference]: Without dead ends: 186 [2020-10-12 16:12:27,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 16:12:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-12 16:12:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2020-10-12 16:12:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 16:12:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2020-10-12 16:12:27,248 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2020-10-12 16:12:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:27,249 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2020-10-12 16:12:27,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-12 16:12:27,249 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2020-10-12 16:12:27,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-12 16:12:27,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:27,250 INFO L422 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:27,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-12 16:12:27,251 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:27,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1126875067, now seen corresponding path program 87 times [2020-10-12 16:12:27,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:27,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032278901] [2020-10-12 16:12:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:27,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:28,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:28,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-12 16:12:28,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:28,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1311 [2020-10-12 16:12:28,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:28,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 89 [2020-10-12 16:12:28,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:28,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-12 16:12:28,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:33,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:33,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:33,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:33,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:33,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:33,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:33,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:33,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:33,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:33,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:33,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:33,626 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032278901] [2020-10-12 16:12:33,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:33,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-12 16:12:33,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987137685] [2020-10-12 16:12:33,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-12 16:12:33,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:33,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-12 16:12:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-12 16:12:33,628 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand 90 states. [2020-10-12 16:12:34,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:34,111 INFO L93 Difference]: Finished difference Result 193 states and 193 transitions. [2020-10-12 16:12:34,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-12 16:12:34,112 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 184 [2020-10-12 16:12:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:34,113 INFO L225 Difference]: With dead ends: 193 [2020-10-12 16:12:34,113 INFO L226 Difference]: Without dead ends: 188 [2020-10-12 16:12:34,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-12 16:12:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-12 16:12:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2020-10-12 16:12:34,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 16:12:34,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-10-12 16:12:34,116 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2020-10-12 16:12:34,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:34,117 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-10-12 16:12:34,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-12 16:12:34,117 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-10-12 16:12:34,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-12 16:12:34,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:34,118 INFO L422 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:34,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-12 16:12:34,118 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash 540180227, now seen corresponding path program 88 times [2020-10-12 16:12:34,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:34,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982899067] [2020-10-12 16:12:34,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:34,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:35,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:35,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-12 16:12:35,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:35,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1300 [2020-10-12 16:12:35,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 90 [2020-10-12 16:12:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:35,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-12 16:12:35,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:40,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:40,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:40,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:40,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:40,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:40,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:40,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:40,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:40,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:40,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982899067] [2020-10-12 16:12:40,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:40,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-10-12 16:12:40,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920900525] [2020-10-12 16:12:40,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-10-12 16:12:40,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:40,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-10-12 16:12:40,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-10-12 16:12:40,714 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 91 states. [2020-10-12 16:12:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:41,138 INFO L93 Difference]: Finished difference Result 195 states and 195 transitions. [2020-10-12 16:12:41,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-12 16:12:41,139 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 186 [2020-10-12 16:12:41,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:41,141 INFO L225 Difference]: With dead ends: 195 [2020-10-12 16:12:41,141 INFO L226 Difference]: Without dead ends: 190 [2020-10-12 16:12:41,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2020-10-12 16:12:41,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-12 16:12:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2020-10-12 16:12:41,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-12 16:12:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2020-10-12 16:12:41,145 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2020-10-12 16:12:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:41,145 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2020-10-12 16:12:41,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-10-12 16:12:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2020-10-12 16:12:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-12 16:12:41,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:41,146 INFO L422 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:41,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-12 16:12:41,146 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:41,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:41,146 INFO L82 PathProgramCache]: Analyzing trace with hash 557516353, now seen corresponding path program 89 times [2020-10-12 16:12:41,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:41,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290293400] [2020-10-12 16:12:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:41,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:41,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:42,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:42,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-12 16:12:42,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1373 [2020-10-12 16:12:42,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-12 16:12:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:42,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 180 [2020-10-12 16:12:42,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:47,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:47,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:47,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:47,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:47,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:47,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:47,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:47,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:47,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:47,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:47,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:47,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290293400] [2020-10-12 16:12:47,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:47,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-12 16:12:47,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924296930] [2020-10-12 16:12:47,926 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-12 16:12:47,926 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:47,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-12 16:12:47,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-10-12 16:12:47,928 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand 92 states. [2020-10-12 16:12:48,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:48,345 INFO L93 Difference]: Finished difference Result 197 states and 197 transitions. [2020-10-12 16:12:48,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-12 16:12:48,346 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 188 [2020-10-12 16:12:48,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:48,347 INFO L225 Difference]: With dead ends: 197 [2020-10-12 16:12:48,347 INFO L226 Difference]: Without dead ends: 192 [2020-10-12 16:12:48,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2020-10-12 16:12:48,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-12 16:12:48,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2020-10-12 16:12:48,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-12 16:12:48,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2020-10-12 16:12:48,353 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2020-10-12 16:12:48,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:48,353 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2020-10-12 16:12:48,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-12 16:12:48,354 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2020-10-12 16:12:48,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-12 16:12:48,355 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:48,355 INFO L422 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:48,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-10-12 16:12:48,355 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:48,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:48,356 INFO L82 PathProgramCache]: Analyzing trace with hash 37664255, now seen corresponding path program 90 times [2020-10-12 16:12:48,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:48,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104309988] [2020-10-12 16:12:48,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:48,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:49,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:49,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-12 16:12:49,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:49,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1395 [2020-10-12 16:12:49,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 92 [2020-10-12 16:12:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:49,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-12 16:12:49,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:55,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:12:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:55,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:55,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:55,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:12:55,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:55,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:12:55,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:12:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:12:55,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:12:55,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:12:55,150 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:12:55,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104309988] [2020-10-12 16:12:55,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:12:55,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-10-12 16:12:55,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948834708] [2020-10-12 16:12:55,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-10-12 16:12:55,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:12:55,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-10-12 16:12:55,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-10-12 16:12:55,152 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand 93 states. [2020-10-12 16:12:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:12:55,680 INFO L93 Difference]: Finished difference Result 199 states and 199 transitions. [2020-10-12 16:12:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-12 16:12:55,681 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 190 [2020-10-12 16:12:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:12:55,682 INFO L225 Difference]: With dead ends: 199 [2020-10-12 16:12:55,682 INFO L226 Difference]: Without dead ends: 194 [2020-10-12 16:12:55,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2020-10-12 16:12:55,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-12 16:12:55,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-10-12 16:12:55,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 16:12:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2020-10-12 16:12:55,687 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2020-10-12 16:12:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:12:55,688 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2020-10-12 16:12:55,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-10-12 16:12:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2020-10-12 16:12:55,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-12 16:12:55,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:12:55,689 INFO L422 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:12:55,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-10-12 16:12:55,690 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:12:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:12:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1323995587, now seen corresponding path program 91 times [2020-10-12 16:12:55,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:12:55,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194530160] [2020-10-12 16:12:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:12:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:12:55,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:12:57,163 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:12:57,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-12 16:12:57,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:12:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1452 [2020-10-12 16:12:57,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:12:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 93 [2020-10-12 16:12:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:12:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 184 [2020-10-12 16:12:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:02,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:13:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:02,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:02,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:02,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:13:02,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:02,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:13:02,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:13:02,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:13:02,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:13:02,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:13:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:13:02,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194530160] [2020-10-12 16:13:02,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:13:02,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94] total 94 [2020-10-12 16:13:02,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551307306] [2020-10-12 16:13:02,749 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-10-12 16:13:02,749 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:13:02,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-10-12 16:13:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-10-12 16:13:02,750 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand 94 states. [2020-10-12 16:13:03,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:13:03,176 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-10-12 16:13:03,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-12 16:13:03,177 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 192 [2020-10-12 16:13:03,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:13:03,179 INFO L225 Difference]: With dead ends: 201 [2020-10-12 16:13:03,179 INFO L226 Difference]: Without dead ends: 196 [2020-10-12 16:13:03,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2020-10-12 16:13:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-12 16:13:03,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2020-10-12 16:13:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-12 16:13:03,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-10-12 16:13:03,183 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2020-10-12 16:13:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:13:03,183 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-10-12 16:13:03,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-10-12 16:13:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-10-12 16:13:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-10-12 16:13:03,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:13:03,184 INFO L422 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:13:03,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-10-12 16:13:03,184 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:13:03,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:13:03,184 INFO L82 PathProgramCache]: Analyzing trace with hash 85921531, now seen corresponding path program 92 times [2020-10-12 16:13:03,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:13:03,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929121396] [2020-10-12 16:13:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:13:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:13:03,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:13:04,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:13:04,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-12 16:13:04,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:13:04,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1473 [2020-10-12 16:13:04,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:13:04,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 94 [2020-10-12 16:13:04,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:13:04,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-12 16:13:04,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0